有理数计算400,一元一次方程100,应用题 有理数运算题84道,一元一次方程84道,42道初一应用题,4...

\u8dea\u6c42100\u9053\u6709\u7406\u6570\u6df7\u5408\u8fd0\u7b97\uff0c\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b50\u9053\uff0c\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u5e94\u7528\u9898\uff0c\u6025\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01

\u96be\u9053\u4e0d\u591f\uff1f\u4e3a\u4ec0\u4e48\u4e0d\u91c7\u7eb3\uff1f

\u6709\u7406\u6570\uff1a
(1) (-9)-(-13)+(-20)+(-2)
(2) 3+13-(-7)/6
(3) (-2)-8-14-13
(4) (-7)*(-1)/7+8
(5) (-11)*4-(-18)/18
(6) 4+(-11)-1/(-3)
(7) (-17)-6-16/(-18)
(8) 5/7+(-1)-(-8)
(9) (-1)*(-1)+15+1
(10) 3-(-5)*3/(-15)
(11) 6*(-14)-(-14)+(-13)
(12) (-15)*(-13)-(-17)-(-4)
(13) (-20)/13/(-7)+11
(14) 8+(-1)/7+(-4)
(15) (-13)-(-9)*16*(-12)
(16) (-1)+4*19+(-2)
(17) (-17)*(-9)-20+(-6)
(18) (-5)/12-(-16)*(-15)
(19) (-3)-13*(-5)*13
(20) 5+(-7)+17-10
(21) (-10)-(-16)-13*(-16)
(22) (-14)+4-19-12
(23) 5*13/14/(-10)
(24) 3*1*17/(-10)
(25) 6+(-12)+15-(-15)
(26) 15/9/13+(-7)
(27) 2/(-10)*1-(-8)
(28) 11/(-19)+(-14)-5
(29) 19-16+18/(-11)
(30) (-1)/19+(-5)+1
31. 2100-21\u00d753+2255
32. (103-336\u00f721)\u00d715
33. 800-(2000-9600\u00f78)
34. 40\u00d748-(1472+328)\u00f75
35. (488+344)\u00f7(202-194)
36. 2940\u00f728+136\u00d77
37. 605\u00d7(500-494)-1898
38. (2886+6618)\u00f7(400-346)
39. 9125-(182+35\u00d722)
40. (154-76)\u00d7(38+49)
41. 3800-136\u00d79-798
42. (104+246)\u00d7(98\u00f77)
43. 918\u00f79\u00d7(108-99)
44. (8645+40\u00d740)\u00f75
45. (2944+864)\u00f7(113-79)
46. 8080-1877+1881\u00f73
47. (5011-43\u00d785)+3397
48. 2300-1122\u00f7(21-15)
49. 816\u00f7(4526-251\u00d718)
50. (7353+927)\u00f7(801-792)
\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\uff1a
7(2x-1)-3(4x-1)=4(3x+2)-1;
(5y+1)+ (1-y)= (9y+1)+ (1-3y);
20%+(1-20%)(320-x)=320\u00d740%
2(x-2)+2=x+1
2(x-2)-3(4x-1)=9(1-x)
x/3 -5 = (5-x)/2
2(x+1) /3=5(x+1) /6 -1
(1/5)x +1 =(2x+1)/4
(5-2)/2 - (4+x)/3 =1
x/3 -1 = (1-x)/2
(x-2)/2 - (3x-2)/4 =-1
11x+64-2x=100-9x
15-(8-5x)=7x+(4-3x)
3(9-7)-2[9-4(2-x)]=22
3/2[2/3(1/4x-1)-2]-x=2
2(x-2)-3(4x-1)=9(1-x)
11x+64-2x=100-9x
15-(8-5x)=7x+(4-3x)
3(x-7)-2[9-4(2-x)]=22
3/2[2/3(1/4x-1)-2]-x=2
2(x-2)+2=x+1
1.7(2x-1)-3(4x-1)=4(3x+2)-1
2.(5y+1)+ (1-y)= (9y+1)+ (1-3y)
3.[ (- 2)-4 ]=x+2
4.20%+(1-20%)(320-x)=320\u00d740%
5.2(x-2)+2=x+1
6.2(x-2)-3(4x-1)=9(1-x)
7.11x+64-2x=100-9x
8.15-(8-5x)=7x+(4-3x)
9.3(x-7)-2[9-4(2-x)]=22
10.3/2[2/3(1/4x-1)-2]-x=2
11.5x+1-2x=3x-2
12.3y-4=2y+1
13.87X*13=5
14.7Z/93=41
15.15X+863-65X=54
16.58Y*55=27489
17.2\uff08x+2\uff09+4=9
18.2(x+4)=10
19.3(x-5)=18
20.4x+8=2(x-1)
21.3(x+3)=9+x
22.6(x/2+1)=12
23.9(x+6)=63
24.2+x=2(x-1/2)
25.8x+3(1-x)=-2
26.7+x-2(x-1)=1
27.x/3 -5 = (5-x)/2
28.2(x+1) /3=5(x+1) /6 -1
29.(1/5)x +1 =(2x+1)/4
30.(5-2)/2 - (4+x)/3 =1
15x-8(5x+1.5)=18*1.25+x
3X+189=521
4Y+119=22
3X*189=5
8Z/6=458
3X+77=59
4Y-6985=81
87X*13=5
7Z/93=41
15X+863-65X=54
58Y*55=27489
1. 2(x-2)-3(4x-1)=9(1-x)
2. 11x+64-2x=100-9x
3. 15-(8-5x)=7x+(4-3x)
4. 3(x-7)-2[9-4(2-x)]=22
5. 3/2[2/3(1/4x-1)-2]-x=2
6. 2(x-2)+2=x+1
7. 0.4(x-0.2)+1.5=0.7x-0.38
8. 30x-10(10-x)=100
9. 4(x+2)=5(x-2)
10. 120-4(x+5)=25
11. 15x+863-65x=54
12. 12.3(x-2)+1=x-(2x-1)
13. 11x+64-2x=100-9x
14. 14.59+x-25.31=0
15. x-48.32+78.51=80
16. 820-16x=45.5\u00d78
17. (x-6)\u00d77=2x
18. 3x+x=18
19. 0.8+3.2=7.2
20. 12.5-3x=6.5
21. 1.2(x-0.64)=0.54
22. x+12.5=3.5x
23. 8x-22.8=1.2
24. 1\ 50x+10=60
25. 2\ 60x-30=20
26. 3\ 3^20x+50=110
27. 4\ 2x=5x-3
28. 5\ 90=10+x
29. 6\ 90+20x=30
30. 7\ 691+3x=700


1 2x-10.3x=15
2 0.52x-(1-0.52)x=80
3 x/2+3x/2=7
4 3x+7=32-2x
5 3x+5(138-x)=540
6 3x-7(x-1)=3-2(x+3)
7 18x+3x-3=18-2(2x-1)
8 3(20-y)=6y-4(y-11)
9 -(x/4-1)=5
10 3[4(5y-1)-8]=6
\uff081\uff09-3x-6x2=7
\uff082\uff095x+1-2x=3x-2
\uff083\uff093y-4=2y+1
\uff084\uff093y-4=y+3
\uff085\uff093y-y=3+4
\uff086\uff090.4x-3=0.1x+2
\uff087\uff095x+15-2x-2=10
\uff088\uff092x-4+5-5x=-1
\uff089\uff093X+189=521
\uff0810\uff094Y+119=22
\uff0811\uff093X*189=5
\uff0812\uff098Z/6=458
\uff0813\uff093X+77=59
\uff0814\uff094Y-6985=81
\uff0815\uff0987X*13=5
\uff0816\uff0946/x=23 x=2
\uff0817\uff0964/x=8 x=8
\uff0818\uff0999/x=11 x=9
\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u5e94\u7528\u9898\uff0c
1.\u4e3d\u4e3d\u548c\u5bb6\u5bb6\u53bb\u4e66\u5e97\u4e70\u4e66\uff0c\u4ed6\u4eec\u540c\u65f6\u559c\u6b22\u4e0a\u4e86\u4e00\u672c\u4e66\uff0c\u6700\u540e\u4e3d\u4e3d\u7528\u81ea\u5df1\u7684\u94b1\u76845\u5206\u4e4b3\uff0c\u5bb6\u5bb6\u7528\u81ea\u5df1\u7684\u94b1\u76843\u5206\u4e4b2\u5404\u4e70\u4e86\u4e00\u672c\uff0c\u4e3d\u4e3d\u5269\u4e0b\u7684\u94b1\u6bd4\u5bb6\u5bb6\u5269\u4e0b\u7684\u94b1\u591a5\u5757\u3002\u4e24\u4eba\u539f\u6765\u5404\u6709\u591a\u5c11\u94b1\uff1f\u4e66\u591a\u5c11\u94b1\uff1f
\u8bbe\u4e3d\u4e3d\u6709x\u5143\u94b1 \u5bb6\u5bb6\u6709y\u5143\u94b1 \u5f97\u51fa\uff1a
3/5x=2/3y
2/5x=1/3y+5 \uff08\u4e3d\u4e3d\u5269\u4e0b2/5 \u5bb6\u5bb6\u5269\u4e0b1/3\uff09

\u89e32\u5143\u4e00\u6b21\u65b9\u7a0b\u5f97x=50 y=45 \u5373\u4e3d\u4e3d50\u5143 \u5bb6\u5bb645\u5143 \u4e6630\u5143\u4e00\u672c

2.\u4e00\u8f86\u6c7d\u8f66\u6bcf\u884c8\u5343\u7c73\u8981\u8017\u6cb94/5\u5343\u514b,\u5e73\u5747\u6bcf\u5343\u514b\u6c7d\u6cb9\u53ef\u884c\u591a\u5c11\u5343\u7c73.\u884c1\u5343\u7c73\u8def\u7a0b\u8981\u8017\u6cb9\u591a\u5c11\u5343\u514b?
8\u96644/5=10\uff08km/)
4/5\u96648=0.1\uff08kg)

3.\u4e00\u8f86\u6469\u6258\u8f661/2\u5c0f\u65f6\u884c30\u5343\u7c73,\u4ed6\u6bcf\u5c0f\u65f6\u884c\u591a\u5c11\u5343\u7c73?\u4ed6\u884c1\u5343\u7c73\u8981\u591a\u5c11\u5c0f\u65f6 ?
30\u00f71/2=60\u5343\u7c73 1\u00f760=1/60\u5c0f\u65f6

4.\u9605\u89c8\u5ba4\u770b\u4e66\u7684\u540c\u5b66\u4e2d\uff0c\u7537\u540c\u5b66\u5360\u4e03\u5206\u4e4b\u56db\uff0c\u4ece\u9605\u89c8\u5ba4\u8d70\u51fa5\u4f4d\u7537\u540c\u5b66\u540e\uff0c\u770b\u4e66\u7684\u540c\u5b66\u4e2d\uff0c\u5973\u540c\u5b66\u5360\u4e8c\u5341\u4e09\u5206\u4e4b\u5341\u4e8c\uff0c\u539f\u6765\u9605\u89c8\u5ba4\u4e00\u5171\u6709\u591a\u5c11\u540d\u540c\u5b66\u5728\u770b\u4e66\uff1f
\u539f\u6765\u6709x\u540d\u540c\u5b66\uff0c\u5973\u751f\u6570\u4e0d\u53d8\uff0c\u6240\u4ee5\uff081-4/7\uff09x=\uff08x-5\uff09*12/23
\u6c42\u51fax=28

5.\u7ea2\uff0c\u9ec4\uff0c\u84dd\u6c14\u7403\u5171\u670962\u53ea\uff0c\u5176\u4e2d\u7ea2\u6c14\u7403\u7684\u4e94\u5206\u4e4b\u4e09\u7b49\u4e8e\u9ec4\u6c14\u7403\u7684\u4e09\u5206\u4e4b\u4e8c\uff0c\u84dd\u6c14\u7403\u670924\u53ea\uff0c\u7ea2\u6c14\u7403\u548c\u9ec4\u6c14\u7403\u5404\u6709\u591a\u5c11\u53ea\uff1f
62-24=38(\u53ea\uff09
3/5\u7ea2=2/3\u9ec4
9\u7ea2=10\u9ec4 \u7ea2:\u9ec4=10:9
38/(10+9)=2
\u7ea2:2*10=20
\u9ec4:20*9=18

6.\u5b66\u6821\u9605\u89c8\u5ba4\u670936\u540d\u5b66\u751f\u770b\u4e66,\u5176\u4e2d4/9\u662f\u5973\u5b66\u751f.\u540e\u53c8\u6765\u4e86\u51e0\u540d\u5973\u5b66\u751f,\u8fd9\u65f6\u5973\u5b66\u751f\u4eba\u6570\u5360\u770b\u4e66\u4eba\u6570\u76843/5,\u540e\u6765\u4e86\u51e0\u540d\u5973\u751f?
\u539f\u6709\u5973\u751f:36\u00d74/9=16(\u4eba)

\u539f\u6709\u7537\u751f:36-16=20(\u4eba)

\u540e\u6709\u603b\u4eba\u6570:20\u00f7(1-3/5)=50(\u4eba)

\u540e\u6709\u5973\u751f:50\u00d73/5=30(\u4eba)

\u6765\u5973\u751f\u4eba\u6570:30-16=14(\u4eba)

7.\u6c34\u7ed3\u6210\u51b0\u540e,\u4f53\u79ef\u8981\u6bd4\u539f\u6765\u81a8\u80c011\u5206\u4e4b1,2.16\u7acb\u65b9\u7c73\u7684\u51b0\u878d\u5316\u6210\u6c34\u540e,\u4f53\u79ef\u662f\u591a\u5c11?
2.16/\uff081+1/11\uff09=1.98(\u7acb\u65b9\u7c73\uff09

8.\u7532\u4e59\u7684\u7cae\u98df560\u5428,\u5982\u679c\u628a\u7532\u7684\u7cae\u98df\u8fd0\u51fa2/9\u7ed9\u4e59,\u5219\u7532\u4e59\u7684\u7cae\u98df\u6b63\u597d\u76f8\u7b49.\u539f\u6765\u7532\u7684\u7cae\u98df\u6709\u591a\u5c11\u5428\uff1f\uff0c\u4e59\u7684\u7cae\u98df\u6709\u591a\u5c11\u5428\uff1f
\u73b0\u5728\u7532\u4e59\u5404\u6709
560\u00f72\uff1d280\u5428
\u539f\u6765\u7532\u6709
280\u00f7\uff081\uff0d2/9\uff09\uff1d360\u5428
\u539f\u6765\u4e59\u6709
560\uff0d360\uff1d200\u5428

9.\u7535\u89c6\u673a\u964d\u4ef7200\u5143.\u6bd4\u539f\u6765\u4fbf\u5b9c\u4e862/11.\u73b0\u5728\u8fd9\u79cd\u7535\u89c6\u673a\u7684\u4ef7\u683c\u662f\u591a\u5c11\u94b1?
\u539f\u4ef7\u662f
200\u00f72/11\uff1d2200\u5143
\u73b0\u4ef7\u662f
2200\uff0d200\uff1d2000\u5143

10\u3002\u4e00\u8f86\u8f66\u4ece\u7532\u5730\u5230\u4e59\u5730,\u884c\u4e86\u5168\u7a0b\u76842/5\u8fd8\u591a20\u5343\u7c73,\u8fd9\u65f6\u5019\u79bb\u4e59\u5730\u8fd8\u670970\u5343\u7c73,\u7532\u4e59\u4e24\u5730\u76f8\u8ddd\u591a\u5c11\u5343\u7c73?
\u5168\u7a0b\u7684
1\uff0d2/5\uff1d3/5
\u662f
20\uff0b70\uff1d90\u5343\u7c73
\u7532\u4e59\u4e24\u5730\u76f8\u8ddd
90\u00f73/5\uff1d150\u5343\u7c73

11.\u5c0f\u660e\u770b\u4e00\u672c\u4e66,\u7b2c\u4e00\u5929\u770b\u4e8628\u9875,\u7b2c\u4e8c\u5929\u770b\u4e86\u5168\u4e66\u76841/5(5\u5206\u4e4b1),\u4e24\u5929\u5171\u770b\u4e86\u5168\u4e66\u76843/8(3\u5206\u4e4b8),\u8fd9\u672c\u4e66\u5171\u6709\u591a\u5c11\u9875\uff1f
\u7b2c\u4e00\u5929\u770b\u7684\u5360\u5168\u4e66\u7684
3/8\uff0d1/5\uff1d7/40
\u8fd9\u672c\u4e66\u5171\u6709
28\u00f77/40\uff1d160\u9875

12.\u5e08\u5f92\u4e8c\u4eba\u540c\u52a0\u5de5\u4e00\u6279\u96f6\u4ef6,\u52a0\u5de5\u4e00\u6bb5\u65f6\u95f4\u540e,\u5e08\u5085\u52a0\u5de5\u4e8684\u4e2a.\u5f92\u5f1f\u52a0\u5de5\u4e8663\u4e2a.\u5e08\u5085\u6bd4\u5f92\u5f1f\u591a\u52a0\u5de5\u7684\u6b63\u597d\u5360\u5168\u90e8\u4efb\u52a1\u76841/28.\u8fd9\u6279\u96f6\u4ef6\u5171\u6709\u591a\u5c11\u4e2a?
\u5047\u8bbe\u8fd9\u6279\u96f6\u4ef6\u5171\u6709X\u4e2a
1/28X=84-63
1/28X=19
X=532
\u6240\u4ee5\u8fd9\u6279\u96f6\u4ef6\u5171\u6709532\u4e2a\u3002

13.\u4e00\u6876\u6cb9,\u5403\u4e867/10\u540e,\u53c8\u6dfb\u8fdb\u4e8615\u5343\u514b,\u8fd9\u65f6\u6876\u4e2d\u7684\u6cb9\u6b63\u597d\u662f\u4e00\u6876\u6cb9\u7684\u4e00\u534a,\u8fd9\u6876\u6cb9\u91cd\u591a\u5c11\u5343\u514b?
15\u00f7\uff087/10-1/2\uff09\uff1d75\uff08\u5343\u514b\uff09

14.\u4e00\u5217\u706b\u8f66\u4ece\u4e0a\u6d77\u5f00\u5f80\u5929\u6d25,\u884c\u4e86\u5168\u8def\u7a0b\u76843/5,\u5269\u4e0b\u7684\u8def\u7a0b,\u5982\u679c\u6bcf\u5c0f\u65f6\u884c106\u5343\u7c73,5\u5c0f\u65f6\u53ef\u4ee5\u5230\u5929\u6d25.\u4e0a\u6d77\u5230\u5929\u6d25\u7684\u94c1\u8def\u957f\u591a\u5c11\u5343\u7c73?
(106*5)/(1-(3/5))
=530/0.4
=1325(km)

15.\u516d\u5e74\u7ea7\u53c2\u52a0\u6570\u5b66\u5174\u8da3\u5c0f\u7ec4\u7684\u5171\u670946,\u5176\u4e2d\u5973\u751f\u4eba\u6570\u76844/5\u662f\u7537\u751f\u4eba\u6570\u76843/2\u500d,\u53c2\u52a0\u5174\u8da3\u5c0f\u7ec4\u7684\u7537\u3001\u5973\u751f\u5404\u6709\u591a\u5c11\u4eba\uff1f
\u7537\u5973\u751f\u4eba\u6570\u6bd4\u662f\uff1a4/5\uff1a3/2=8\uff1a15
\u7537\u751f\u4eba\u6570\uff1a46/\uff088+15\uff09*8=16\u4eba
\u5973\u751f\u4eba\u657046-16=30\u4eba

16.\u5f20\u7ea2\u6284\u5199\u4e00\u4efd\u7a3f\u4ef6,\u9700\u89815\u5c0f\u65f6\u6284\u5b8c.\u8fd9\u4efd\u7a3f\u4ef6\u5df2\u7531\u522b\u4eba\u6284\u4e861/3,\u5269\u4e0b\u7684\u4ea4\u7ed9\u5f20\u7ea2\u6284,\u8fd8\u8981\u7528\u51e0\u5c0f\u65f6\u624d\u80fd\u6284\u5b8c?
(1-1/3)/(1/5)=10/3
\u8fd8\u89813 1/3\u4e2a\u5c0f\u65f6\u6284\u5b8c

17.\u4e24\u5217\u706b\u8f66\u540c\u65f6\u4ece\u76f8\u8ddd600\u5343\u7c73\u7684\u4e24\u57ce\u76f8\u5bf9\u5f00\u51fa.\u5217\u706b\u8f66\u6bcf\u5c0f\u65f6\u884c60\u5343\u7c73,\u53e6\u4e00\u5217\u706b\u8f66\u6bcf\u5c0f\u65f6\u884c75\u5343\u7c73,\u7ecf\u8fc7\u51e0\u5c0f\u65f6\u4e24\u8f66\u53ef\u4ee5\u76f8\u9047?
600/(60+75)=40/9(\u5c0f\u65f6)

\u7ecf\u8fc740/9\u5c0f\u65f6\u4e24\u8f66\u53ef\u4ee5\u76f8\u9047\u3002

18.\u4e00\u8f86\u6469\u6258\u8f66\u6bcf\u5c0f\u65f6\u884c\u4e8664\u5343\u7c73,\u627e\u8fd9\u6837\u7684\u901f\u5ea6,\u4ece\u7532\u5230\u4e59\u7528\u4e863/4\u5c0f\u65f6,\u7532\u4e59\u4e24\u5730\u76f8\u8ddd\u591a\u5c11\u5343\u7c73?
64\u00d73/4=48\u5343\u7c73

19.\u6c34\u679c\u5e97\u5728\u4e24\u5929\u5185\u5356\u5b8c\u4e00\u6279\u6c34\u679c,\u7b2c\u4e00\u5929\u5356\u51fa\u6c34\u679c\u603b\u91cd\u91cf\u76843/5,\u6bd4\u7b2c\u4e8c\u5929\u591a\u5356\u4e8630\u5343\u514b,\u8fd9\u6279\u6c34\u679c\u5171\u6709\u591a\u5c11\u5343\u514b?
\u7b2c\u4e00\u5929\u5356\u51fa\u6c34\u679c\u603b\u91cd\u91cf\u76843/5\uff0c\u5219\uff0c\u7b2c\u4e8c\u5929\u5356\u4e862/5\uff0c
3/5-2/5=1/5\uff0c\u7b2c\u4e00\u5929\u6bd4\u7b2c\u4e8c\u5929\u591a\u7684\uff0c
30\u00f71/5=150\u5343\u514b\uff0c
\u7b97\u5f0f\u662f\uff0c
1-3/5=2/5
3/5-2/5=1/5
30\u00f71/5=150\u5343\u514b

20.\u897f\u8857\u5c0f\u5b66\u5171\u6709\u5b66\u751f910\u4eba,\u5176\u4e2d\u5973\u751f\u53604/7,\u5973\u751f\u6709\u591a\u5c11\u4eba?\u7537\u751f\u6709\u591a\u5c11\u4eba?
910*4/7=\uff08910*4\uff09/7=520......\u5973\u751f
910-520=390.......\u7537\u751f

21.\u4e00\u5757\u957f\u65b9\u5f62\u5730,\u957f60\u7c73,\u5bbd\u662f\u957f\u76842/5,\u8fd9\u5757\u5730\u7684\u9762\u79ef\u662f\u591a\u5c11\u5e73\u65b9\u7c73?
4/5*5/8=\uff084*5\uff09/\uff085*8\uff09=1/2\uff08\u7c73)
4/5-1/2=8/10-5/10=3/10(\u7c73\uff09

22.\u91d1\u9c7c\u6c60\u91cc\u7ea2\u91d1\u9c7c\u4e0e\u9ed1\u91d1\u9c7c\u6761\u6570\u7684\u6bd4\u662f7:3,\u9ed1\u91d1\u9c7c\u67099\u6761,\u7ea2\u91d1\u9c7c\u6709\u591a\u5c11\u6761?
9\u00f73\u00d77\uff1d21\u6761

23.6\u5e74\u7ea7\u6709\u5b66\u751f132\u4eba,\u5176\u4e2d\u7537\u5b66\u751f\u4e0e\u5973\u5b66\u751f\u4eba\u6570\u7684\u6bd4\u662f6:5,6\u5e74\u7ea7\u7537.\u5973\u5b66\u751f\u5404\u6709\u591a\u5c11\u4eba?
132\u00f7\uff086\uff0b5\uff09\uff1d12\u4eba
\u7537\u540c\u5b66\u6709
12\u00d76\uff1d72\u4eba
\u5973\u540c\u5b66\u6709
12\u00d75\uff1d60\u4eba

24.\u7532\u6570\u548c\u4e59\u6570\u7684\u6bd4\u662f2:3,\u4e59\u6570\u548c\u4e19\u6570\u7684\u6bd4\u662f4:5.\u6c42\u7532\u6570\u548c\u4e19\u6570\u7684\u6bd4.
\u7532\uff1a\u4e59\uff1d2\uff1a3\uff1d8\uff1a12
\u4e59\uff1a\u4e19\uff1d4\uff1a5\uff1d12\uff1a15
\u7532\uff1a\u4e59\uff1a\u4e19\uff1d8\uff1a12\uff1a15
\u7532\uff1a\u4e19\uff1d8\uff1a15

25.\u89e3\u653e\u8def\u5c0f\u5b66\u4eca\u5e74\u690d\u6811\u7684\u68f5\u6570\u662f\u53bb\u5e74\u76841.2\u500d.\u5199\u51fa\u8fd9\u4e2a\u5c0f\u5b66\u4eca\u5e74\u690d\u6811\u68f5\u6570\u548c\u53bb\u5e74\u690d\u6811\u68f5\u6570\u7684\u6bd4.\u5316\u7b80.
1.2\uff1a1\uff1d6\uff1a5

26.\u4e00\u4e2a\u7535\u89c6\u673a\u5382\u53bb\u5e74\u5f69\u8272\u7535\u89c6\u673a\u7684\u4ea7\u91cf\u4e0e\u7535\u89c6\u673a\u603b\u4ea7\u91cf\u7684\u6bd4\u662f20\u5206\u4e4b9.\u53bb\u5e74\u5171\u751f\u4ea7\u7535\u89c6\u673a250000\u592a,\u5176\u4e2d\u5f69\u8272\u7535\u89c6\u673a\u6709\u591a\u5c11\u53f0?
250000\u00d720\u5206\u4e4b9\uff1d112500\u53f0

27.\u67d0\u5de5\u5382\u5de5\u4eba\u5360\u5168\u5382\u804c\u5de5\u603b\u6570\u76843\u5206\u4e4b2,\u6280\u672f\u4eba\u5458\u5360\u5168\u573a\u804c\u5de5\u603b\u6570\u76849\u5206\u4e4b2,\u5176\u4f59\u7684\u662f\u5e72\u90e8.\u5199\u51fa\u8fd9\u4e2a\u5382\u7684\u5de5\u4eba,\u6280\u672f\u4eba\u5458\u548c\u5e72\u90e8\u4eba\u6570\u7684\u6bd4.
\u5e72\u90e8\u5360\u5168\u5382\u804c\u5de5\u603b\u6570\u7684
1\uff0d3\u5206\u4e4b2\uff0d9\u5206\u4e4b2\uff1d9\u5206\u4e4b1
\u8fd9\u4e2a\u5382\u7684\u5de5\u4eba,\u6280\u672f\u4eba\u5458\u548c\u5e72\u90e8\u4eba\u6570\u7684\u6bd4\u662f
3\u5206\u4e4b2\uff1a9\u5206\u4e4b2\uff1a9\u5206\u4e4b1\uff1d6\uff1a2\uff1a1

28.\u67d0\u73ed\u5b66\u751f\u4eba\u6570\u572840\u523050\u4eba\u4e4b\u95f4,\u7537\u751f\u4eba\u6570\u548c\u5973\u751f\u4eba\u6570\u7684\u6bd4\u662f5:6.
\u8fd9\u4e2a\u73ed\u7684\u7537\u751f\u548c\u5973\u751f\u5404\u6709\u591a\u5c11\u4eba..
\u56e0\u4e3a\u4eba\u6570\u4e3a\u6574\u6570\uff0c
\u6240\u4ee5\u73ed\u7ea7\u4eba\u6570\u80fd\u88ab5\uff0b6\uff1d11\u6574\u9664
\u6240\u4ee5\u73ed\u7ea7\u4eba\u6570\u4e3a44\u4eba
\u7537\u751f\u6709
44\u00f7\uff085\uff0b6\uff09\u00d75\uff1d20\u4eba
\u5973\u751f\u6709
44\uff0d20\uff1d24\u4eba

29.\u56fe\u4e66\u9986\u79d1\u6280\u4e66\u4e0e\u6587\u827a\u4e66\u7684\u6bd4\u662f4 \uff1a5\uff0c\u53c8\u8d2d\u8fdb300\u672c\u6587\u827a\u672f\u540e\uff0c\u79d1\u6280\u4e66\u4e0e\u6587\u827a\u4e66\u7684\u6bd4\u662f5 \uff1a7\uff0c\u6587\u827a\u4e66\u6bd4\u539f\u6765\u589e\u52a0\u4e86\u767e\u5206\u4e4b\u51e0\uff1f
\u6587\u827a\u4e66\u539f\u6709\uff1a300\u00f7\uff087/12-5/9\uff09=10800\uff08\u672c\uff09
\u6587\u827a\u4e66\u6bd4\u539f\u6765\u589e\u52a0\u4e86\uff1a300\u00f710800\u22482.8%

30.100\u514b\u7cd6\u6c34\u6b63\u597d\u88c5\u6ee1\u4e86\u4e00\u4e2a\u73bb\u7483\u676f,\u5176\u4e2d\u542b\u7cd610\u514b.\u4ece\u676f\u4e2d\u5012\u51fa10\u514b\u7cd6\u6c34\u540e,\u518d\u5f80\u676f\u4e2d\u52a0\u6ee1\u6c34,\u8fd9\u662f\u88ab\u5b50\u91cc\u7cd6\u4e0e\u6c34\u7684\u6bd4\u662f\u591a\u5c11?
\u539f\u6765\u91cc\u9762\u6c34\u662f90\uff0c\u7cd6\u662f10
\u5012\u51fa10\u514b\uff0c\u90a3\u91cc\u9762\u8fd8\u526990\uff0c\u5176\u4e2d\u6c3481\uff0c\u7cd69
\u518d\u52a0\u6ee1\u6c34\u53c8\u6c34\u4e3a91\uff0c\u7cd6\u8fd8\u662f9
\u90a3\u5c31\u662f9/91

31.\u4e94\u3001\u516d\u5e74\u7ea7\u53ea\u6709\u5b66\u751f175\u4eba\u3002\u5206\u6210\u4e09\u7ec4\u53c2\u52a0\u6d3b\u52a8\u3002\u4e00\u3001\u4e8c\u4e24\u7ec4\u7684\u4eba\u6570\u6bd4\u662f5\uff1a4\uff0c\u7b2c\u4e09\u7ec4\u670967\u4eba\uff0c\u7b2c\u4e00\u3001\u4e8c\u4e24\u7ec4\u5404\u6709\u591a\u5c11\u4eba\uff1f
\uff081\uff09\u4e00\u3001\u4e8c\u7ec4\u5171\u6709\u5b66\u751f175\u4eba-67\u4eba=108\u4eba
\uff082\uff09\u4e00\u7ec4\u5b66\u751f\u6709108\u4eba\u00d75/9=60\u4eba
\uff083\uff09\u4e8c\u7ec4\u5b66\u751f\u6709108\u4eba\u00d74/9=48\u4eba

32.\u67d0\u6821\u6709\u5b66\u751f465\u4eba\uff0c\u5176\u4e2d\u5973\u751f\u76842/3\u6bd4\u7537\u751f\u76844/5\u5c1120\u4eba\u3002\u7537\u00b7\u5973\u5404\u4e2a\u591a\u5c11?
\u5973\u751f\u76843\u5206\u4e4b2\u6bd4\u7537\u751f\u76845\u5206\u4e4b4\u5c1120\u4eba
\u5973\u751f\u6bd4\u7537\u751f\u7684(4/5)/(2/3)=6/5\u5c1120/(2/3)=30\u4eba
\u7537\u751f\u6709
(465+30)/(1+6/5)=225(\u4eba)
\u5973\u751f\u6709
465-225=240(\u4eba)

33.\u4e00\u4efd\u7a3f\u4ef6,\u7b2c\u4e00\u5929\u6253\u4e86\u5168\u7bc7\u7a3f\u76847\u5206\u4e4b1\u7b2c\u4e8c\u5929\u6253\u4e865\u5206\u4e4b2\u7b2c\u4e8c\u5929\u6bd4\u7b2c\u4e00\u5929\u591a\u6253\u4e869\u9875,\u8fd9\u7bc7\u7a3f\u4ef6\u6709\u591a\u5c11\u9875?
9\u9664\u4ee5\uff085\u5206\u4e4b2-7\u5206\u4e4b1\uff09
=9\u9664\u4ee535\u5206\u4e4b9
=35\uff08\u9875\uff09
\u7b54\uff1a\u8fd9\u89c1\u7a3f\u4ef6\u670935\u9875\u3002

34.\u4e00\u5757\u5730\uff0c\u957f\u548c\u5bbd\u7684\u6bd4\u662f8\uff1a5\uff0c\u957f\u6bd4\u5bbd\u591a24\u7c73\u3002\u8fd9\u5757\u5730\u6709\u591a\u5c11\u5e73\u65b9\u7c73\uff1f
\u8bbe\u957f\u662f8\u4efd\uff0c\u5219\u5bbd\u662f5\u4efd\uff0c\u591a\u4e86\uff1a3\u4efd\uff0c\u5373\u662f24\u7c73


\u90a3\u4e48\u4e00\u4efd\u662f\uff1a24/3=8\u7c73

\u5373\u957f\u662f\uff1a8*8=64\u7c73\uff0c\u5bbd\u662f\uff1a8*5=40\u7c73

\u9762\u79ef\u662f\uff1a64*40=2560\u5e73\u65b9\u7c73

35.\u5982\u679c\u7537\u540c\u5b66\u7684\u4eba\u6570\u6bd4\u5973\u540c\u5b66\u591a25%\u90a3\u4e48\u5973\u540c\u5b66\u7684\u4eba\u6570\u6bd4\u7537\u540c\u5b66\u5c11\u591a\u5c11\uff1f
\u5973\u540c\u5b66\u4e3a\u5355\u4f4d1
\u7537\u540c\u5b66\u4e3a1\uff0b25\uff05\uff1d125\uff05
\u5973\u540c\u5b66\u7684\u4eba\u6570\u6bd4\u7537\u540c\u5b66\u5c11\uff08125\uff05\uff0d1\uff09\u00f7125\uff05\uff1d20\uff05

36.\u9972\u517b\u5382\u4eca\u5e74\u517b\u732a1987\u5934,\u6bd4\u53bb\u5e74\u517b\u732a\u5934\u6570\u76843\u500d\u5c11245\u5934,\u4eca\u5e74\u6bd4\u53bb\u5e74\u591a\u517b\u732a\u591a\u5c11\u5934?
\u53bb\u5e74\u517b\u732a\uff1a(1987+245)/3=744
\u4eca\u5e74\u6bd4\u53bb\u5e74\u591a\u517b\u732a:1987-744=1243

37.\u5c0f\u4f1f\u548c\u5c0f\u82f1\u7ed9\u5e0c\u671b\u5de5\u7a0b\u6350\u6b3e\u94b1\u6570\u7684\u6bd4\u662f2:5.\u5c0f\u82f1\u6350\u4e8635\u5143,\u5c0f\u4f1f\u6350\u4e86\u591a\u5c11\u94b1?
\u8bbe\u5c0f\u4f1f\u6350\u4e86X\u5143

\u6240\u4ee5 2:5=X:35 \u5f97:X=14\u5143 \u5c0f\u4f1f\u6350\u4e8614\u5143

38.\u4e09\u4e2a\u5e73\u5747\u6570\u4e3a8.4\uff0c\u5176\u4e2d\u7b2c\u4e00\u4e2a\u6570\u662f9.2\uff0c\u7b2c\u4e8c\u4e2a\u6570\u6bd4\u7b2c\u4e09\u4e2a\u6570\u5c110.8\uff0c\u7b2c\u4e09\u4e2a\u6570\u662f\u4ec0\u4e48
\u7b2c3\u4e2a\u6570\u662f8.4
\u89e3:\u8bbe\u7b2c3\u4e2a\u6570\u4e3ax,\u5217\u65b9\u7a0b\u4e3a:
3*[9.2+(x-0.8)+x]=8.4
\u89e3\u5f97 x=8.4

39.\u6709\u4e24\u6839\u7ef3\u5b50\uff0c\u7b2c\u4e00\u6839\u7ef3\u5b50\u7684\u957f\u5ea6\u662f\u7b2c\u4e8c\u6839\u76841.5\u500d\uff0c\u7b2c\u4e8c\u6839\u6bd4\u7b2c\u4e00\u6839\u77ed3\u7c73\uff0c\u4e24\u6839\u7ef3\u5b50\u5404\u957f\u591a\u5c11\u7c73\uff1f
\u8bbe\u7b2c\u4e8c\u6839\u957fx\u7c73\uff0c\u5219\u7b2c\u4e8c\u6839\u957f1.5x\u7c73
1.5x-x\uff1d3
0.5x\uff1d3
x\uff1d6
6\u00d71.5\uff1d9\uff08\u7c73\uff09
\u7b2c\u4e00\u6839\u957f6\u7c73
\u7b2c\u4e8c\u6839\u957f9\u7c73

40.\u5de5\u7a0b\u961f\u4fee\u4e00\u6761\u8def\uff0c\u5df2\u4fee\u597d\u7684\u957f\u5ea6\u4e0e\u5269\u4e0b\u7684\u6bd4\u662f4\uff1a5\uff0c\u82e5\u518d\u4fee25\u7c73\u5c31\u6070\u597d\u4fee\u5230\u4e86\u8fd9\u6761\u8def\u7684\u4e2d\u70b9\uff0c\u8fd9\u6761\u8def\u5168\u957f\u591a\u5c11\u7c73\uff1f
4+5=9
\u89e3\uff1a\u8bbe\u8fd9\u6761\u8def\u5168\u957fx\u7c73\uff1a
(5/9-4/9)x=25
1/9x=25
x=225
\u8fd9\u6761\u8def\u5168\u957f225\u7c73

\u56de\u7b54\u8005\uff1a lealun - \u4e8c\u7ea7 2010-7-14 07:36
\u7b54\u590d \u5171 1 \u6761
\u68c0\u4e3e \uff08\u5206\u914d\u8c03\u8fd0\u95ee\u9898\uff09\u67d0\u6821\u5e08\u751f\u5230\u7532\u3001\u4e59\u4e24\u4e2a\u5de5\u5382\u53c2\u52a0\u52b3\u52a8\uff0c\u5982\u679c\u4ece\u7532\u5382\u62bd9\u4eba\u5230\u4e59\u5382\uff0c\u5219\u4e24\u5382\u7684\u4eba\u6570\u76f8\u540c\uff1b\u5982\u679c\u4ece\u4e59\u5382\u62bd5\u4eba\u5230\u7532\u5382\uff0c\u5219\u7532\u5382\u7684\u4eba\u6570\u662f\u4e59\u5382\u76842\u500d\uff0c\u5230\u4e24\u4e2a\u5de5\u5382\u7684\u4eba\u6570\u5404\u662f\u591a\u5c11\uff1f
\u89e3\uff1a\u8bbe\u5230\u7532\u5de5\u5382\u7684\u4eba\u6570\u4e3ax\u4eba\uff0c\u5230\u4e59\u5de5\u5382\u7684\u4eba\u6570\u4e3ay\u4eba
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a1\u3001\u62bd9\u4eba\u540e\u5230\u7532\u5de5\u5382\u7684\u4eba\u6570=\u5230\u4e59\u5de5\u5382\u7684\u4eba\u6570
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1ax-9=
2\u3001\u62bd5\u4eba\u540e\u5230\u7532\u5de5\u5382\u7684\u4eba\u6570=
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a

\uff08\u91d1\u878d\u5206\u914d\u95ee\u9898\uff09\u5c0f\u534e\u4e70\u4e8610\u5206\u4e0e20\u5206\u7684\u90ae\u7968\u517116\u679a\uff0c\u82b1\u4e862\u51435\u89d2\uff0c\u95ee10\u5206\u4e0e20\u5206\u7684\u90ae\u7968\u5404\u4e70\u4e86\u591a\u5c0f\uff1f \u89e3\uff1b\u8bbe\u5171\u4e70x\u679a10\u5206\u90ae\u7968\uff0cy\u679a20\u5206\u90ae\u7968
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a
1\u300110\u5206\u90ae\u7968\u7684\u679a\u6570+20\u5206\u90ae\u7968\u7684\u679a\u6570=\u603b\u679a\u6570
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u300110\u5206\u90ae\u7968\u7684\u603b\u4ef7+ =\u5168\u90e8\u90ae\u7968\u7684\u603b\u4ef7
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a10X+ =

\uff08\u505a\u5de5\u5206\u914d\u95ee\u9898\uff09\u5c0f\u5170\u5728\u73a9\u5177\u5de5\u5382\u52b3\u52a8\uff0c\u505a4\u4e2a\u5c0f\u72d7\u30017\u4e2a\u5c0f\u6c7d\u8f66\u7528\u53bb3\u5c0f\u65f642\u5206\uff0c\u505a5\u4e2a\u5c0f\u72d7\u30016\u4e2a\u5c0f\u6c7d\u8f66\u7528\u53bb3\u5c0f\u65f637\u5206\uff0c\u5e73\u5747\u505a1\u4e2a\u5c0f\u72d7\u30011\u4e2a\u5c0f\u6c7d\u8f66\u5404\u7528\u591a\u5c11\u65f6\u95f4\uff1f
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a
1\u3001\u505a4\u4e2a\u5c0f\u72d7\u7684\u65f6\u95f4+ =3\u65f642\u5206
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001 +\u505a6\u4e2a\u5c0f\u6c7d\u8f66\u7684\u65f6\u95f4=3\u65f637\u5206
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a

\uff08\u884c\u7a0b\u95ee\u9898\uff09\u7532\u3001\u4e59\u4e8c\u4eba\u76f8\u8ddd6km\uff0c\u4e8c\u4eba\u540c\u5411\u800c\u884c\uff0c\u75323\u5c0f\u65f6\u53ef\u8ffd\u4e0a\u4e59\uff1b\u76f8\u5411\u800c\u884c\uff0c1\u5c0f\u65f6\u76f8\u9047\u3002\u4e8c\u4eba\u7684\u5e73\u5747\u901f\u5ea6\u5404\u662f\u591a\u5c11\uff1f \u89e3\uff1a\u8bbe\u7532\u6bcf\u5c0f\u65f6\u8d70x\u5343\u7c73\uff0c\u4e59\u6bcf\u5c0f\u65f6\u8d70y\u5343\u7c73
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a
1\u3001\u540c\u5411\u800c\u884c\uff1a\u7532\u7684\u8def\u7a0b=\u4e59\u7684\u8def\u7a0b+
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u76f8\u5411\u800c\u884c\uff1a\u7532\u7684\u8def\u7a0b+ =
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a

\uff08\u500d\u6570\u95ee\u9898\uff09\u67d0\u5e02\u73b0\u670942\u4e07\u4eba\u53e3\uff0c\u8ba1\u5212\u4e00\u5e74\u540e\u57ce\u9547\u4eba\u53e3\u589e\u52a00.8\uff05\uff0c\u519c\u6751\u4eba\u53e3\u589e\u52a0\u5de5\u53821.1\uff05,\u8fd9\u6837\u5168\u5e02\u4eba\u53e3\u5c06\u589e\u52a01\uff05\uff0c\u6c42\u8fd9\u4e2a\u5e02\u73b0\u5728\u7684\u57ce\u9547\u4eba\u53e3\u4e0e\u519c\u6751\u4eba\u53e3\uff1f
\u89e3\uff1a\u8fd9\u4e2a\u5e02\u73b0\u5728\u7684\u57ce\u9547\u4eba\u53e3\u6709x\u4e07\u4eba\uff0c\u519c\u6751\u4eba\u53e3\u6709y\u4e07\u4eba
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a
1\u3001\u73b0\u5728\u57ce\u9547\u4eba\u53e3+ =\u73b0\u5728\u5168\u5e02\u603b\u4eba\u53e3
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u660e\u5e74\u589e\u52a0\u540e\u7684\u57ce\u9547\u4eba\u53e3+ =\u660e\u5e74\u5168\u5e02\u603b\u4eba\u53e3
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a\uff081+0.8\uff05\uff09x+ =

\uff08\u5206\u914d\u95ee\u9898\uff09\u67d0\u5e7c\u513f\u56ed\u5206\u840d\u679c\uff0c\u82e5\u6bcf\u4eba3\u4e2a\uff0c\u5219\u52692\u4e2a\uff0c\u82e5\u6bcf\u4eba4\u4e2a\uff0c\u5219\u6709\u4e00\u4e2a\u5c111\u4e2a\uff0c\u95ee\u5e7c\u513f\u56ed\u6709\u51e0\u4e2a\u5c0f\u670b\u53cb\uff1f \u89e3\uff1a\u8bbe\u5e7c\u513f\u56ed\u6709x\u4e2a\u5c0f\u670b\u53cb\uff0c\u840d\u679c\u6709y\u4e2a
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a1\u3001\u840d\u679c\u603b\u6570=\u6bcf\u4eba\u52063\u4e2a+
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u840d\u679c\u603b\u6570=
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a

\uff08\u6d53\u5ea6\u5206\u914d\u95ee\u9898\uff09\u8981\u914d\u6d53\u5ea6\u662f45%\u7684\u76d0\u6c3412\u5343\u514b\uff0c\u73b0\u670910%\u7684\u76d0\u6c34\u4e0e85%\u7684\u76d0\u6c34\uff0c\u8fd9\u4e24\u79cd\u76d0\u6c34\u5404\u9700\u591a\u5c11\uff1f
\u89e3\uff1a\u8bbe\u542b\u76d010%\u7684\u76d0\u6c34\u6709x\u5343\u514b\uff0c\u542b\u76d085%\u7684\u76d0\u6c34\u6709y\u5343\u514b\u3002 \u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb \uff1a
1\u3001\u542b\u76d010%\u7684\u76d0\u6c34\u4e2d\u76d0\u7684\u91cd\u91cf+\u542b\u76d085%\u7684\u76d0\u6c34\u4e2d\u76d0\u7684\u91cd\u91cf=
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a10%x+ =
2\u3001\u542b\u76d010%\u7684\u76d0\u6c34\u91cd\u91cf+\u542b\u76d085%\u7684\u76d0\u6c34\u91cd\u91cf=
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1ax+y=

\uff08\u91d1\u878d\u5206\u914d\u95ee\u9898\uff09\u9700\u8981\u7528\u591a\u5c11\u6bcf\u5343\u514b\u552e4.2\u5143\u7684\u7cd6\u679c\u624d\u80fd\u4e0e\u6bcf\u5343\u514b\u552e3.4\u5143\u7684\u7cd6\u679c\u6df7\u5408\u6210\u6bcf\u5343\u514b\u552e3.6\u5143\u7684\u6742\u62cc\u7cd6200\u5343\u514b\uff1f\u89e3\uff1a\u8bbe\u6bcf\u5343\u514b\u552e4.2\u5143\u7684\u7cd6\u679c\u4e3ax\u5343\u514b\uff0c\u6bcf\u5343\u514b\u552e3.4\u5143\u7684\u7cd6\u679c\u4e3ay\u5343\u514b
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb \uff1a
1\u3001\u6bcf\u5343\u514b\u552e4.2\u5143\u7684\u7cd6\u679c\u9500\u552e\u603b\u4ef7+ =
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u6bcf\u5343\u514b\u552e4.2\u5143\u7684\u7cd6\u679c\u91cd\u91cf+ =
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a

\uff08\u51e0\u4f55\u5206\u914d\u95ee\u9898\uff09\u5982\u56fe\uff1a\u75288\u5757\u76f8\u540c\u7684\u957f\u65b9\u5f62\u62fc\u6210\u4e00\u4e2a\u5bbd\u4e3a48\u5398\u7c73\u7684\u5927\u957f\u65b9\u5f62\uff0c\u6bcf\u5757\u5c0f\u957f\u65b9\u5f62\u7684\u957f\u548c\u5bbd\u5206\u522b\u662f\u591a\u5c11\uff1f \u89e3\uff1a\u8bbe\u5c0f\u957f\u65b9\u5f62\u7684\u957f\u662fx\u5398\u7c73\uff0c\u5bbd\u662fy\u5398\u7c73
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb \uff1a
1\u3001\u5c0f\u957f\u65b9\u5f62\u7684\u957f+ =\u5927\u957f\u65b9\u5f62\u7684\u5bbd
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u5c0f\u957f\u65b9\u5f62\u7684\u957f=
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a

\uff08\u6750\u6599\u5206\u914d\u95ee\u9898\uff09\u4e00\u5f20\u684c\u5b50\u7531\u684c\u9762\u548c\u56db\u6761\u811a\u7ec4\u6210\uff0c1\u7acb\u65b9\u7c73\u7684\u6728\u6750\u53ef\u5236\u6210\u684c\u976250\u5f20\u6216\u5236\u4f5c\u684c\u811a300\u6761\uff0c\u73b0\u67095\u7acb\u65b9\u7c73\u7684\u6728\u6750\uff0c\u95ee\u5e94\u5982\u4f55\u5206\u914d\u6728\u6750\uff0c\u53ef\u4ee5\u4f7f\u684c\u9762\u548c\u684c\u811a\u914d\u5957\uff1f
\u89e3\uff1a\u8bbe\u6709
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb \uff1a1\u3001\u5236\u4f5c\u684c\u9762\u7684\u6728\u6750+ =
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u6240\u6709\u684c\u9762\u7684\u603b\u6570\uff1a\u6240\u6709\u684c\u811a\u7684\u603b\u6570=
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a

\uff08\u548c\u5dee\u500d\u95ee\u9898\uff09\u4e00\u4e2a\u4e24\u4f4d\u6570\uff0c\u5341\u4f4d\u4e0a\u7684\u6570\u5b57\u6bd4\u4e2a\u4f4d\u4e0a\u7684\u6570\u5b57\u59275\uff0c\u5982\u679c\u628a\u5341\u4f4d\u4e0a\u7684\u6570\u5b57\u4e0e\u4e2a\u4f4d\u4e0a\u7684\u6570\u5b57\u4ea4\u6362\u4f4d\u7f6e\uff0c\u90a3\u4e48\u5f97\u5230\u7684\u65b0\u4e24\u4f4d\u6570\u6bd4\u539f\u6765\u7684\u4e24\u4f4d\u6570\u7684\u4e00\u534a\u8fd8\u5c119\uff0c\u6c42\u8fd9\u4e2a\u4e24\u4f4d\u6570\uff1f
\u89e3\uff1a\u8bbe\u4e2a\u4f4d\u6570\u5b57\u4e3ax\uff0c\u5341\u4f4d\u6570\u5b57\u4e3ay\u3002 \u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a
1\u3001\u4e2a\u4f4d\u6570\u5b57= -5
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u65b0\u4e24\u4f4d\u6570=
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a

\uff08\u5206\u914d\u8c03\u8fd0\uff09\u4e00\u6279\u8d27\u7269\u8981\u8fd0\u5f80\u67d0\u5730\uff0c\u8d27\u4e3b\u51c6\u5907\u79df\u7528\u6c7d\u8fd0\u516c\u53f8\u7684\u7532\u3001\u4e59\u4e24\u79cd\u8d27\u8f66\uff0c\u5df2\u77e5\u8fc7\u53bb\u79df\u7528\u8fd9\u4e24\u79cd\u6c7d\u8f66\u8fd0\u8d27\u7684\u60c5\u51b5\u5982\u5de6\u8868\u6240\u793a\uff0c\u73b0\u79df\u7528\u8be5\u516c\u53f85\u8f86\u7532\u79cd\u8d27\u8f66\u548c6\u8f86\u4e59\u79cd\u8d27\u8f66\uff0c\u4e00\u6b21\u521a\u597d\u8fd0\u5b8c\u8fd9\u6279\u8d27\u7269\uff0c\u95ee\u8fd9\u6279\u8d27\u7269\u6709\u591a\u5c11\u5428\uff1f
\u89e3\uff1a\u8bbe
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a
1\u3001\u7b2c\u4e00\u6b21\uff1a\u7532\u8d27\u8f66\u8fd0\u7684\u8d27\u7269\u91cd\u91cf+ =36
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u7b2c\u4e8c\u6b21\uff1a\u7532\u8d27\u8f66\u8fd0\u7684\u8d27\u7269\u91cd\u91cf+ =26
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a

\u7b49\u59d0\u6709\u65f6\u95f4\u7ed9\u4f60\u627e,\u5728\u8fd9\u4e4b\u524d\u4f60\u5148\u5b8c\u6210\u4e00\u90e8\u5206\u5427!
\u65b0\u5e74\u5feb\u4e50!

[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4*(-0.4)]/1/3+2
22+(-4)+(-2)+4*3
-2*8-8*1/2+8/1/8
(2/3+1/2)/(-1/12)*(-12)
(-28)/(-6+4)+(-1)
2/(-2)+0/7-(-8)*(-2)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-3x+2y-5x-7y
有理数的加减混合运算

【【同步达纲练习】

1.选择题:

(1)把-2-(+3)-(-5)+(-4)+(+3)写成省略括号和的形式,正确的是( )

A.-2-3-5-4+3 B.-2+3+5-4+3

C.-2-3+5-4+3 D.-2-3-5+4+3

(2)计算(-5)-(+3)+(-9)-(-7)+ 所得结果正确的是( )

A.-10 B.-9 C.8 D.-23
(3)-7,-12,+2的代数和比它们的绝对值的和小( )

A.-38 B.-4 C.4 D.38

(4)若 +(b+3)2=0,则b-a- 的值是( )

A.-4 B.-2 C.-1 D.1
(5)下列说法正确的是( )

A.两个负数相减,等于绝对值相减

B.两个负数的差一定大于零

C.正数减去负数,实际是两个正数的代数和

D.负数减去正数,等于负数加上正数的绝对值

(6)算式-3-5不能读作( )

A.-3与5的差 B.-3与-5的和

C.-3与-5的差 D.-3减去5

2.填空题:(4′×4=16′)

(1)-4+7-9=- - + ;

(2)6-11+4+2=- + - + ;

(3)(-5)+(+8)-(+2)-(-3)= + - + ;

(4)5-(-3 )-(+7)-2 =5+ - - + - .

3.把下列各式写成省略括号的和的形式,并说出它们的两种读法:(8′×2=16′)

(1)(-21)+(+16)-(-13)-(+7)+(-6);

(2)-2 -(- )+(-0.5)+(+2)-(+ )-2.

4.计算题(6′×4=24′)

(1)-1+2-3+4-5+6-7;

(2)-50-28+(-24)-(-22);

(3)-19.8-(-20.3)-(+20.2)-10.8;

(4)0.25- +(-1 )-(+3 ).

5.当x=-3.7,y=-1.8,z=-1.5时,求下列代数式的值(5′×4=20′)

(1)x+y-z; (2)-x-y+z; (3)-x+y+z; (4)x-y-z.

【素质优化训练】

(1) (-7)-(+5)+(+3)-(-9)=-7 5 3 9;

(2)-(+2 )-(-1 )-(+3 )+(- )

=( 2 )+( 1 )+( 3 )+( );

(3)-14 5 (-3)=-12;

(4)-12 (-7) (-5) (-6)=-16;

(5)b-a-(+c)+(-d)= a b c d;

2.当x= ,y=- ,z=- 时,分别求出下列代数式的值;

(1)x-(-y)+(-z); (2)x+(-y)-(+z);

(3)-(-x)-y+z; (4)-x-(-y)+z.

3.就下列给的三组数,验证等式:

a-(b-c+d)=a-b+c-d是否成立.

(1)a=-2,b=-1,c=3,d=5;

(2)a=23 ,b=-8,c=-1 ,d=1 .

4.计算题

(1)-1-23.33-(+76.76);

(2)1-2*2*2*2;

(3)(-6-24.3)-(-12+9.1)+(0-2.1);

(4)-1+8-7

【生活实际运用】

某水利勘察队,第一天向上游走5 千米,第二天又向上游走5 ,第三天向下游走4 千米,第四天又向下游走4.5千米,这时勘察队在出发点的哪里?相距多少千米?

参考答案:

【同步达纲练习】

1.(1)C;(2)B;(3)D;(4)A;(5)C;(6)C 2.(1)4,(-7),(-9) (2)(-6),(-11),(-4),2; (3)-5,8,2,3; (4)3,7,2;

3.略4.(1)-4; (2)-80; (3)-30.5 (4)-5
5.(1)-4; (2)4; (3)0.4; (4)-0.4.

【素质优化训练】

1.(1)-,+,+; (2)-,+,-,-; (3)+,+; (4)-,+,+; (5)-,+,-,-.

2.(1) (2) (3) (4)-

3.(1) (2)都成立.

4.(1)-
(2)
(3)-29.5

(4)-1 第(4)题注意同号的数、互为相反数先分别结合。
247x+114=37
71x+3=124
40x+61=223
35x+103=171
239x+51=119
187x+255=67
135x+203=15
83x+151=219
31x+99=167
235x+47=115
183x+251=63
131x+199=11
79x+147=215
79x+199=116
137x+43=111
179x+247=59
127x+195=7
74x+142=210
22x+90=158
226x+38=106
174x+242=54
122x+190=2
70x+138=206
71x+191=107
128x+34=102
170x+238=50
118x+186=254
66x+134=202
14x+82=150
218x+30=98
166x+234=46
163x+24=190
198x+78=93
57x+172=78
146x+214=26
94x+162=230
42x+110=178
42x+162=79
100x+6=74
142x+210=22
90x+158=226
38x+106=174
242x+54=122
239x+100=10
17x+153=169
133x+248=154
221x+33=101
222x+86=2
23x+185=253
65x+133=201
13x+81=149
217x+29=97
218x+82=254
19x+181=249
61x+129=197
9x+77=145
6x+123=33
41x+177=193
156x+15=177
245x+57=125
245x+110=26
47x+209=21
89x+157=225
37x+105=173
37x+157=74
95x+1=69
137x+205=17
134x+251=161
169x+48=64
28x+143=49
169x+33=206
227x+133=201
13x+81=149
217x+29=97
214x+74=240
248x+128=144
107x+222=128
249x+113=29
50x+212=24
145x+9=181
202x+108=176
244x+56=124
241x+102=12
20x+156=172
135x+250=156
20x+141=57
78x+240=52
120x+188=256
120x+241=157
178x+84=152
13x+130=40
48x+184=199
163x+22=184
48x+168=85
106x+12=80
197x+58=224
232x+112=127
91x+206=112
232x+96=13
34x+196=8
128x+248=165
186x+92=160
21x+138=48
55x+191=207
171x+30=192
56x+176=92
113x+19=87
208x+72=244
9x+171=239
100x+217=127
135x+15=31
47x+214=224
245x+151=219
80x+197=107
115x+251=11
230x+89=251
115x+236=152
173x+79=147
11x+132=48
69x+231=43
160x+21=187
195x+75=90
106x+17=28
49x+211=23
143x+7=180
250x+205=115
123x+3=18
34x+201=212
233x+139=207
68x+185=95
103x+238=254
14x+181=192
213x+119=187
51x+171=88
158x+112=22
30x+166=182
198x+109=119
140x+46=114
235x+99=15
85x+40=206
214x+94=110
126x+37=47
117x+72=238
246x+126=142
157x+69=79
100x+6=74
194x+59=231
45x+256=166
174x+54=70
85x+253=7
80x+39=211
232x+138=206
67x+184=94
154x+86=206
123x+144=50
167x+28=194
254x+186=50
223x+244=150
14x+134=51
121x+76=242
250x+129=145
161x+72=83
156x+114=31
101x+56=221
229x+109=125
141x+52=62
132x+87=253
5x+141=157
173x+84=94
168x+126=42
112x+67=233
241x+121=137
153x+64=74
148x+106=22
92x+47=213
221x+101=117
132x+44=54
124x+79=245
253x+133=149
164x+76=86
159x+118=34
104x+59=225
233x+113=128
144x+55=66
139x+97=14
84x+39=205
9x+197=61
234x+255=161
22x+139=49
109x+41=161
130x+203=214
28x+239=149
157x+36=52
68x+235=246
63x+21=194
8x+218=128
136x+16=32
48x+215=225
39x+250=160
221x+153=17
242x+59=69
139x+94=4
12x+148=164
180x+91=101
174x+133=49
119x+74=240
44x+232=97
62x+132=136
196x+128=249
165x+186=92
212x+77=249
63x+18=184
244x+176=40
9x+82=93
163x+118=28
88x+20=140
106x+176=180
240x+172=36
209x+230=136
256x+120=37
107x+62=228
32x+220=84
53x+126=137
207x+162=71
132x+64=184
149x+219=223
28x+216=80
49x+122=132
202x+157=67
127x+60=180
149x+222=232
46x+1=167
227x+159=24
245x+59=63
123x+55=176
144x+218=228
42x+253=163
223x+155=20
244x+62=72
142x+97=7
67x+255=119
85x+155=159
219x+151=15
240x+57=68
138x+93=3
63x+251=115
84x+157=168
238x+193=103
163x+95=215
181x+251=255
59x+247=111
80x+153=164
234x+189=98
159x+91=211
180x+253=7
77x+32=198
52x+33=251
159x+45=3
21x+143=251
249x+139=108
26x+190=194
254x+186=51
16x+86=90
203x+187=156
74x+238=242
98x+83=52
226x+134=138
247x+228=190
99x+240=198
167x+240=251
65x+20=186
42x+27=251
170x+78=82
142x+74=194
160x+230=234
38x+226=90
59x+132=143
213x+168=78
138x+70=190
208x+74=183
128x+222=86
52x+121=125
186x+118=238
207x+24=34
104x+59=225
82x+66=35
209x+117=121
181x+114=234
199x+13=17
77x+9=130
98x+172=182
48x+56=70
15x+109=230
195x+9=13
73x+5=126
91x+161=165
21x+6=230
149x+57=61
121x+53=173
142x+215=226
40x+251=161
14x+251=213
122x+7=221
190x+7=18
88x+43=209
65x+49=18
193x+101=105
165x+97=217
183x+253=1
113x+97=66
240x+148=152
213x+145=9
234x+51=61
184x+191=205
147x+238=96
51x+99=57
75x+197=49
250x+89=209
177x+251=5
127x+135=149
91x+182=40
251x+42=1
225x+43=53
175x+183=197
142x+236=101
66x+136=140
249x+230=192
101x+242=200
169x+242=253
119x+126=141
86x+180=44
62x+184=37
31x+174=136
94x+28=84
45x+238=45
16x+232=85
79x+222=184
194x+180=85
184x+24=80
38x+228=28
245x+182=245
216x+176=28
23x+166=128
36x+178=136
154x+20=128
73x+168=32
49x+172=24
225x+63=184
149x+219=223
76x+57=20
184x+69=28
45x+168=20
221x+59=180
197x+63=172
117x+211=75
41x+111=115
227x+212=180
99x+7=11
123x+108=76
251x+159=163
16x+253=215
124x+9=223
241x+107=216
161x+255=119
137x+3=112
57x+151=15
33x+155=7
209x+47=167
185x+51=159
105x+199=63
81x+203=55
49x+193=155
63x+205=163
181x+47=155
149x+36=255
163x+48=7
24x+147=255
200x+38=159
176x+43=151
145x+32=251
159x+44=3
20x+142=251
196x+34=154
172x+38=147
92x+186=50
68x+190=43
37x+180=142
51x+192=150
168x+34=143
88x+182=46
64x+186=39
33x+176=138
47x+188=146
164x+30=139
84x+178=42
60x+182=34
29x+172=134
43x+184=142
160x+26=134
80x+174=38
56x+178=30
24x+168=130
87x+21=78
242x+127=86
103x+226=78
72x+215=178
86x+227=186
203x+70=178
175x+66=35
209x+117=121
230x+211=173
82x+223=181
199x+65=174
171x+62=30
1x+217=70
64x+207=169
127x+61=117
78x+15=78
253x+161=165
18x+255=217
178x+115=178
97x+5=9
121x+105=74
45x+5=113
55x+146=4
12x+111=174
145x+105=213
208x+95=57
221x+107=65
83x+205=57
51x+195=157
118x+55=118
36x+200=204
57x+38=1
218x+155=218
188x+149=1
202x+40=161
178x+45=153
147x+34=252
210x+144=200
109x+250=208
226x+92=201
195x+82=44
5x+199=5
180x+88=92
204x+189=157
128x+88=197
191x+78=40
254x+188=244
153x+38=252
14x+136=245
239x+126=88
49x+242=49
20x+236=88
34x+128=248
10x+132=240
234x+122=84
41x+232=32
249x+186=249
167x+75=79
188x+169=132
93x+30=93
63x+24=132
126x+13=232
189x+123=180
140x+78=141
111x+71=180
174x+61=23
237x+171=227
188x+126=188
159x+119=228
222x+109=71
29x+219=19
236x+174=236
207x+167=20
14x+157=119
28x+169=127
145x+11=120
114x+1=219
180x+117=180
151x+111=219
214x+101=63
21x+211=11
228x+165=228
199x+159=11
5x+149=111
68x+3=59
20x+213=20
246x+207=59
53x+196=159
116x+50=107
68x+5=68
38x+255=107
101x+244=206
164x+98=154
115x+53=115
86x+46=155
149x+36=254
212x+146=202
163x+101=163
134x+94=203
197x+84=46
4x+194=250
211x+148=211
182x+142=251
245x+132=94
52x+242=42
3x+196=3
23x+32=238
176x+134=50
173x+180=194
189x+76=38
252x+186=242
203x+140=203
174x+134=242
236x+124=86
43x+233=34
251x+188=251
221x+182=34
28x+171=134
143x+130=35
133x+229=30
246x+184=247
217x+177=30
76x+16=82
181x+21=77
35x+225=25
239x+173=229
190x+128=190
213x+226=183
130x+111=73
31x+221=21
235x+169=225
186x+123=186
157x+117=226
16x+211=22
121x+217=17
231x+165=221
179x+113=169
130x+67=130
101x+61=169
216x+155=222
64x+161=217
174x+109=165
126x+63=126
96x+57=165
159x+46=9
19x+5=166
8x+104=161
118x+52=109
69x+7=70
40x+256=109
155x+95=161
4x+100=156
114x+48=104
65x+3=65
85x+94=45
238x+196=113
235x+242=1
251x+138=100
110x+96=1
100x+196=252
213x+150=213
184x+144=253
43x+238=49
148x+244=44
2x+192=248
2x+244=149
248x+88=144
154x+140=45
196x+20=181
23x+120=176
186x+172=77
228x+52=213
55x+151=208
169x+106=169
188x+198=148
85x+44=216
82x+90=104
150x+90=156
255x+95=151
109x+43=99
109x+96=256
99x+195=251
212x+150=212
235x+248=205
152x+133=95
105x+92=252
95x+191=247
205x+139=195
205x+191=96
195x+35=91
52x+245=52
72x+81=31
225x+183=100
222x+229=243
34x+229=40
139x+235=35
45x+31=192
34x+131=187
144x+79=135
145x+131=36
138x+237=44
63x+73=23
216x+175=91
10x+69=188
135x+116=79
88x+75=236
179x+53=55
146x+106=215
5x+201=11
110x+206=6
220x+154=210
220x+207=111
213x+57=119
139x+148=99
36x+250=167
85x+145=8
211x+192=154
164x+150=55
154x+250=50
60x+46=207
50x+146=202
212x+198=103
202x+42=98
108x+94=255
150x+230=135
30x+110=15
114x+210=10
20x+6=167
62x+142=47
145x+242=42
52x+38=199
41x+137=194
204x+190=95
193x+33=90
152x+190=200
47x+34=195
89x+170=74
18x+148=150
241x+201=54
149x+138=234
69x+29=138
184x+124=190
33x+129=185
195x+182=86
188x+32=94
114x+123=74
60x+67=82
79x+225=194
214x+223=174
111x+69=242
160x+220=83
79x+109=169
2x+75=86
4x+63=182
179x+209=13
102x+175=185
104x+163=26
22x+53=113
202x+19=29
204x+7=126
73x+54=17
27x+13=174
69x+149=54
201x+22=177
58x+181=33
30x+177=146
165x+174=125
111x+118=133
130x+21=245
61x+123=178
117x+30=45
39x+182=144
154x+141=45
196x+21=181
24x+120=176
186x+172=77
228x+52=213
108x+188=93
192x+32=88
98x+84=245
140x+220=125
20x+100=5
104x+200=256
10x+252=157
52x+132=37
188x+12=173
16x+112=168
178x+164=69
220x+44=205
96x+174=72
161x+234=244
163x+222=85
81x+111=172
53x+176=28
26x+172=141
160x+170=120
106x+114=128
174x+114=180
75x+156=60
159x+255=55
65x+52=212
107x+188=92
243x+68=228
123x+204=108
3x+84=244
188x+62=64
207x+220=177
176x+209=20
168x+245=143
25x+147=256
46x+241=52
203x+27=188
83x+163=68
167x+7=63
125x+164=173
21x+7=168
60x+137=35
124x+197=207
126x+185=48
44x+75=135
17x+139=247
38x+233=44
195x+19=180
75x+155=60
211x+35=196
91x+171=76
227x+51=212
103x+180=79
167x+241=251
170x+229=92
88x+118=178
60x+183=35
81x+21=87
238x+63=223
118x+199=103
254x+79=239
134x+215=119
14x+95=255
147x+224=122
4x+126=235
25x+221=31
182x+6=167
62x+142=47
198x+22=183
78x+158=63
214x+38=199
91x+168=66
204x+70=179
225x+164=231
126x+206=111
6x+86=247
142x+222=127
22x+102=7
158x+238=143
35x+112=10
148x+14=122
169x+108=175
70x+150=55
2x+135=144
244x+227=126
8x+130=238
29x+224=35
186x+10=171
66x+146=51
202x+26=187
81x+162=67
217x+42=203
94x+171=69
207x+74=182
228x+168=234
129x+210=114
9x+90=250
145x+226=130
25x+106=10
161x+242=146
90x+220=222
57x+17=126
172x+112=178
73x+153=58
209x+33=194
86x+163=61
199x+65=174
220x+159=226

-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4*(-0.4)]/1/3+2
22+(-4)+(-2)+4*3
-2*8-8*1/2+8/1/8
(2/3+1/2)/(-1/12)*(-12)
(-28)/(-6+4)+(-1)
2/(-2)+0/7-(-8)*(-2)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-1+2-3+4-5+6-7
-50-28+(-24)-(-22)
-19.8-(-20.3)-(+20.2)-10.8
0.25- +(-1 )-(+3 )
-1-〔1-(1-0.6÷3)〕×〔2-(-3)×(-4)〕
0÷(-4)-42-(-8)÷(-1)3
-32-(-3) 2-(-3)3+(-1)6
3×(-2)2+(-2×3)2+(-2+3)2
(-12)÷4×(-6)÷2
(-12)÷4×(-6)×2
75÷〔138÷(100-54)〕
85×(95-1440÷24)
80400-(4300+870÷15)
240×78÷(154-115)
1437×27+27×563
〔75-(12+18)〕÷15
2160÷〔(83-79)×18〕
280+840÷24×5
325÷13×(266-250)
85×(95-1440÷24)
58870÷(105+20×2)
1437×27+27×563
81432÷(13×52+78)
[37.85-(7.85+6.4)] ×30
156×[(17.7-7.2)÷3]
(947-599)+76×64
36×(913-276÷23)
-(3.4 1.25×2.4)
0.8×〔15.5-(3.21 5.79)〕
(31.8 3.2×4)÷5
194-64.8÷1.8×0.9 36.72÷4.25×9.9
3.416÷(0.016×35)
0.8×[(10-6.76)÷1.2]
(136+64)×(65-345÷23)
(6.8-6.8×0.55)÷8.5
0.12× 4.8÷0.12×4.8
(58+37)÷(64-9×5)
812-700÷(9+31×11)
(3.2×1.5+2.5)÷1.6
85+14×(14+208÷26)
120-36×4÷18+35
(284+16)×(512-8208÷18)
9.72×1.6-18.305÷7

4/7÷[1/3×(3/5-3/10)]
(4/5+1/4)÷7/3+7/10
12.78-0÷( 13.4+156.6 )
37.812-700÷(9+31×11)
(136+64)×(65-345÷23)
3.2×(1.5+2.5)÷1.6
85+14×(14+208÷26)
(58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5
(284+16)×(512-8208÷18)
0.12× 4.8÷0.12×4.8
(3.2×1.5+2.5)÷1.6
120-36×4÷18+35
10.15-10.75×0.4-5.7
5.8×(3.87-0.13)
+4.2×3.74 347+45×2-4160÷52
32.52-(6+9.728÷3.2)×2.5 87(58+37)÷(64-9×5)
[(7.1-5.6)×0.9-1.15] ÷2.5 (3.2×1.5+2.5)÷1.6
5.4÷[2.6×(3.7-2.9)+0.62] 12×6÷(12-7.2)-6
3.2×6+(1.5+2.5)÷1.6 (3.2×1.5+2.5)÷1.6
5.8×(3.87-0.13)+4.2×3.74
33.02-(148.4-90.85)÷2.5

39+[-23]+0+[-16]= 0

[-18]+29+[-52]+60= 19

[-3]+[-2]+[-1]+0+1+2= -3

[-301]+125+301+[-75]= 50

[-1]+[-1/2]+3/4+[-1/4]= -1

[-7/2]+5/6+[-0.5]+4/5+19/6= 1.25

[-26.54]+[-6.14]+18.54+6.14= -8

1.125+[-17/5]+[-1/8]+[-0.6]= -3

[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4*(-0.4)]/1/3+2
22+(-4)+(-2)+4*3
-2*8-8*1/2+8/1/8
(2/3+1/2)/(-1/12)*(-12)
(-28)/(-6+4)+(-1)
2/(-2)+0/7-(-8)*(-2)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-3x+2y-5x-7y
有理数的加减混合运算
回答者: 370116 - 翰林文圣 十八级 1-22 10:56
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其他回答 共 1 条
1.计算题
(1)3.28-4.76+1 - ;

(2)2.75-2 -3 +1 ;

(3)42÷(-1 )-1 ÷(-0.125);

(4)(-48) ÷82-(-25) ÷(-6)2;

(5)- +( )×(-2.4).

2.计算题:(10′×5=50′)
(1)-23÷1 ×(-1 )2÷(1 )2;
(2)-14-(2-0.5)× ×[( )2-( )3];
(3)-1 ×[1-3×(- )2]-( )2×(-2)3÷(- )3
(4)(0.12+0.32) ÷ [-22+(-3)2-3 × ];
(5)-6.24×32+31.2×(-2)3+(-0.51) ×624.
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4*(-0.4)]/1/3+2
22+(-4)+(-2)+4*3
-2*8-8*1/2+8/1/8
(2/3+1/2)/(-1/12)*(-12)
(-28)/(-6+4)+(-1)
2/(-2)+0/7-(-8)*(-2)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-3x+2y-5x-7y

75÷〔138÷(100-54)〕 85×(95-1440÷24)
80400-(4300+870÷15) 240×78÷(154-115)
1437×27+27×563 〔75-(12+18)〕÷15
2160÷〔(83-79)×18〕 280+840÷24×5
325÷13×(266-250) 85×(95-1440÷24)
58870÷(105+20×2) 1437×27+27×563
81432÷(13×52+78) [37.85-(7.85+6.4)] ×30
156×[(17.7-7.2)÷3] (947-599)+76×64
36×(913-276÷23) [192-(54+38)]×67
[(7.1-5.6)×0.9-1.15]÷2.5 81432÷(13×52+78)
5.4÷[2.6×(3.7-2.9)+0.62] (947-599)+76×64 60-(9.5+28.9)]÷0.18 2.881÷0.43-0.24×3.5 20×[(2.44-1.8)÷0.4+0.15] 28-(3.4 1.25×2.4) 0.8×〔15.5-(3.21 5.79)〕 (31.8 3.2×4)÷5 194-64.8÷1.8×0.9 36.72÷4.25×9.9 3.416÷(0.016×35) 0.8×[(10-6.76)÷1.2]
(136+64)×(65-345÷23) (6.8-6.8×0.55)÷8.5
0.12× 4.8÷0.12×4.8 (58+37)÷(64-9×5)
812-700÷(9+31×11) (3.2×1.5+2.5)÷1.6
85+14×(14+208÷26) 120-36×4÷18+35
(284+16)×(512-8208÷18) 9.72×1.6-18.305÷7

4/7÷[1/3×(3/5-3/10)] (4/5+1/4)÷7/3+7/10
12.78-0÷( 13.4+156.6 ) 37.812-700÷(9+31×11) (136+64)×(65-345÷23) 3.2×(1.5+2.5)÷1.6
85+14×(14+208÷26) (58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5 (284+16)×(512-8208÷18)
0.12× 4.8÷0.12×4.8 (3.2×1.5+2.5)÷1.6
120-36×4÷18+35 10.15-10.75×0.4-5.7
5.8×(3.87-0.13)+4.2×3.74 347+45×2-4160÷52
32.52-(6+9.728÷3.2)×2.5 87(58+37)÷(64-9×5)
[(7.1-5.6)×0.9-1.15] ÷2.5 (3.2×1.5+2.5)÷1.6
5.4÷[2.6×(3.7-2.9)+0.62] 12×6÷(12-7.2)-6
3.2×6+(1.5+2.5)÷1.6 (3.2×1.5+2.5)÷1.6
5.8×(3.87-0.13)+4.2×3.74
33.02-(148.4-90.85)÷2.5
(一)计算题:
(1)23+(-73)
(2)(-84)+(-49)
(3)7+(-2.04)
(4)4.23+(-7.57)
(5)(-7/3)+(-7/6)
(6)9/4+(-3/2)
(7)3.75+(2.25)+5/4
(8)-3.75+(+5/4)+(-1.5)
(9)(-17/4)+(-10/3)+(+13/3)+(11/3)
(10)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)
(11)(+1.3)-(+17/7)
(12)(-2)-(+2/3)
(13)|(-7.2)-(-6.3)+(1.1)|
(14)|(-5/4)-(-3/4)|-|1-5/4-|-3/4|)
(15)(-2/199)*(-7/6-3/2+8/3)
(16)4a)*(-3b)*(5c)*1/6

1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3

0.12χ+1.8×0.9=7.2 (9-5χ)×0.3=1.02 6.4χ-χ=28+4.4

11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5

51.-5+58+13+90+78-(-56)+50
52.-7*2-57/(3
53.(-7)*2/(1/3)+79/(3+6/4)
54.123+456+789+98/(-4)
55.369/33-(-54-31/15.5)
56.39+{3x[42/2x(3x8)]}
57.9x8x7/5x(4+6)
58.11x22/(4+12/2)
59.94+(-60)/10

1.
a^3-2b^3+ab(2a-b)
=a^3+2a^2b-2b^3-ab^2
=a^2(a+2b)-b^2(2b+a)
=(a+2b)(a^2-b^2)
=(a+2b)(a+b)(a-b)

2.
(x^2+y^2)^2-4y(x^2+y^2)+4y^2
=(x^2+y^2-2y)^2

3.
(x^2+2x)^2+3(x^2+2x)+x^2+2x+3
=(x^2+2x)^2+4(x^2+2x)+3
=(x^2+2x+3)(x^2+2x+1)
=(x^2+2x+3)(x+1)^2

4.
(a+1)(a+2)+(2a+1)(a-2)-12
=a^2+3a+2+2a^2-3a-2-12
=3a^2-12
=3(a+2)(a-2)

5.
x^2(y+z)^2-2xy(x-z)(y+z)+y^2(x-z)^2
=[x(y+z)-y(x-z)]^2
=(xz+yz)^2
=z^2(x+y)^2

6.
3(a+2)^2+28(a+2)-20
=[3(a+2)-2][(a+2)+10]
=(3a+4)(a+12)

7.
(a+b)^2-(b-c)^2+a^2-c^2
=(a+b)^2-c^2+a^2-(b-c)^2
=(a+b+c)(a+b-c)+(a+b-c)(a-b+c)
=(a+b-c)(a+b+c+a-b+c)
=2(a+b-c)(a+c)

8.
x(x+1)(x^2+x-1)-2
=(x^2+x)(x^2+x-1)-2
=(x^2+x)^2-(x^2+x)-2
=(x^2+x-2)(x^2+x+1)
=(x+2)(x-1)(x^2+x+1)
(尽力了!!!)

[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4*(-0.4)]/1/3+2
22+(-4)+(-2)+4*3
-2*8-8*1/2+8/1/8
(2/3+1/2)/(-1/12)*(-12)
(-28)/(-6+4)+(-1)
2/(-2)+0/7-(-8)*(-2)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-1+2-3+4-5+6-7
-50-28+(-24)-(-22)
-19.8-(-20.3)-(+20.2)-10.8
0.25- +(-1 )-(+3 )
-1-〔1-(1-0.6÷3)〕×〔2-(-3)×(-4)〕
0÷(-4)-42-(-8)÷(-1)3
-32-(-3) 2-(-3)3+(-1)6
3×(-2)2+(-2×3)2+(-2+3)2
(-12)÷4×(-6)÷2
(-12)÷4×(-6)×2
75÷〔138÷(100-54)〕
85×(95-1440÷24)
80400-(4300+870÷15)
240×78÷(154-115)
1437×27+27×563
〔75-(12+18)〕÷15
2160÷〔(83-79)×18〕
280+840÷24×5
325÷13×(266-250)
85×(95-1440÷24)
58870÷(105+20×2)
1437×27+27×563
81432÷(13×52+78)
[37.85-(7.85+6.4)] ×30
156×[(17.7-7.2)÷3]
(947-599)+76×64
36×(913-276÷23)
-(3.4 1.25×2.4)
0.8×〔15.5-(3.21 5.79)〕
(31.8 3.2×4)÷5
194-64.8÷1.8×0.9 36.72÷4.25×9.9
3.416÷(0.016×35)
0.8×[(10-6.76)÷1.2]
(136+64)×(65-345÷23)
(6.8-6.8×0.55)÷8.5
0.12× 4.8÷0.12×4.8
(58+37)÷(64-9×5)
812-700÷(9+31×11)
(3.2×1.5+2.5)÷1.6
85+14×(14+208÷26)
120-36×4÷18+35
(284+16)×(512-8208÷18)
9.72×1.6-18.305÷7

4/7÷[1/3×(3/5-3/10)]
(4/5+1/4)÷7/3+7/10
12.78-0÷( 13.4+156.6 )
37.812-700÷(9+31×11)
(136+64)×(65-345÷23)
3.2×(1.5+2.5)÷1.6
85+14×(14+208÷26)
(58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5
(284+16)×(512-8208÷18)
0.12× 4.8÷0.12×4.8
(3.2×1.5+2.5)÷1.6
120-36×4÷18+35
10.15-10.75×0.4-5.7
5.8×(3.87-0.13)
+4.2×3.74 347+45×2-4160÷52
32.52-(6+9.728÷3.2)×2.5 87(58+37)÷(64-9×5)
[(7.1-5.6)×0.9-1.15] ÷2.5 (3.2×1.5+2.5)÷1.6
5.4÷[2.6×(3.7-2.9)+0.62] 12×6÷(12-7.2)-6
3.2×6+(1.5+2.5)÷1.6 (3.2×1.5+2.5)÷1.6
5.8×(3.87-0.13)+4.2×3.74
33.02-(148.4-90.85)÷2.5
——————————————————————————(以上计算题,找死我了,还有一些是自己写的)
1.计算题:(10′×5=50′)
(1)3.28-4.76+1 - ;

(2)2.75-2 -3 +1 ;

(3)42÷(-1 )-1 ÷(-0.125);

(4)(-48) ÷82-(-25) ÷(-6)2;

(5)- +( )×(-2.4).

2.计算题:(10′×5=50′)
(1)-23÷1 ×(-1 )2÷(1 )2;
(2)-14-(2-0.5)× ×[( )2-( )3];
(3)-1 ×[1-3×(- )2]-( )2×(-2)3÷(- )3
(4)(0.12+0.32) ÷ [-22+(-3)2-3 × ];
(5)-6.24×32+31.2×(-2)3+(-0.51) ×624.
【素质优化训练】
1.填空题:
(1)如是 ,那么ac 0;如果 ,那么ac 0;
(2)若 ,则abc= ; -a2b2c2= ;
(3)已知a,b互为相反数,c,d互为倒数,x的绝对值等于2,那么x2-(a+b)+cdx= .
2.计算:
(1)-32-

(2){1+[ ]×(-2)4}÷(- );

(3)5-3×{-2+4×[-3×(-2)2-(-4) ÷(-1)3]-7}.

【生活实际运用】
甲用1000元人民币购买了一手股票,随即他将这手股票转卖给乙,获利10%,而后乙又将这手股票反卖给甲,但乙损失了10%.最后甲按乙卖给甲的价格的九折将这手股票卖给了乙,在上述股票交易中( )
A.甲刚好亏盈平衡; B.甲盈利1元;
C.甲盈利9元; D.甲亏本1.1元.

参考答案:
【同步达纲练习】
1.(1)-0.73 (2)-1 ; (3)-14; (4)- ; (5)-2.9
2.(1)-3 (2)-1 ; (3)- ; (4)1; (5)-624.
【素质优化训练】
1.(1)>,>; (2)24,-576; (3)2或6.[提示:∵ =2 ∴x2=4,x=±2]. 2.(1)-31; (2)-8 (3)224
【生活实际运用】 B
————————————————————————(以上练习题)

帮你弄好了,看看可以吗?我尽最大的努力了。

新没有任何意义,做题要做会而不是做多,只要学会举一反三就ok了

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