帮我出15道有理数的加减乘除还有乘方的混合运算，要过程和结果。谢谢！ 难度较大的有理数加减乘除乘方混合运算练习题有哪些？
\u6211\u662f\u4e00\u4e2a\u521d\u4e00\u65b0\u751f\uff0c\u8981\u627e70\u9053\u6709\u7406\u6570\u52a0\u51cf\u4e58\u9664\u4e58\u65b9\u6df7\u5408\u8fd0\u7b97\u7684\u98981) (-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)+([|-98|+76+(-87)]-23[56+(-75)-(7)]-(8+4+3)
-(-89)+|-87|-23+[-75-(7)+76]-(10+39-24)
|-9.8|+(-4.6)-[8.7-(-1.3)]+(-5.4)-(-0.2)
[-(-84)+46]-|-9.1|+(+1.9)
[-(-90)+(-34)]-(+43)+(-57)+10
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)
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
\uff08-5\uff09-\uff08+3\uff09+\uff08-9\uff09-\uff08-7\uff09
\uff08-5\uff09+\uff08+8\uff09-\uff08+2\uff09-\uff08-3\uff09
5-\uff08-3 \uff09-\uff08+7\uff09-2
\uff08-21\uff09+\uff08+16\uff09-\uff08-13\uff09-\uff08+7\uff09+\uff08-6\uff09
2 -\uff08- \uff09+\uff08-0.5\uff09+(+2)-(+ )-2
(-7)-(+5)+(+3)-(-9)
-(+2 )-(-1 )-(+3 )
-14 5 (-3)=-12
-12 (-7) (-5) (-6)
23.33-(+76.76)
(-6-24.3)-(-12+9.1)+(0-2.1)
6+(7-8)
(-78)+25+26+27
(-3)+(-2)+(-1)
39+28+26-125
[2/3-4-1/4+(-0.4)]+1/3+2
22+(-4)+(-2)+4-3
(-2)+7-(-16)-(-3)
(-5)-(+3)+(-9)-(-7)
(-1/4)+(-5/6)-(-1/3)+2/3-1/6
2/3+(-1/2)-(-1/3)+1/4
(-5)+(-8)-(-2)-3
(-21)+(+16)-(-13)-(+7)+(-6)
(-2/3)+(-1/3)+3/4+(-1/4)
(-0.73)+(-0.62)-(+0.75)
(-19)+(-11)-(-33)+27
(-6.4)+(-3.6)-(-12.5)+4.5
(-81)+(-19)-27+33
(-3.2)-(-6.2)+(-5.1)+(-4.9)
(-6.9)+(-3.1)+(+2.7)+(-2.1)
39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+3/4+[-1/4]=
[-7/2]+5/6+[-0.5]+4/5+19/6=
[-26.54]+[-6.14]+18.54+6.14=
-13)
(12) (-15)*(-13)-(-17)-(-4)
(13) (-20)/13/(-7)+11
(14) 8+(-1)/7+(-4)
(15) (-13)-(-9)*16*(-12)\u5206\u4eab\u7ed9\u4f60\u7684\u670b\u53cb\u5427\uff1ai\u8d34\u5427 \u65b0\u6d6a\u5fae\u535a\u817e\u8baf\u5fae\u535aQQ\u7a7a\u95f4\u4eba\u4eba\u7f51\u8c46\u74e3MSN
\u5bf9\u6211\u6709\u5e2e\u52a9
41\u56de\u7b54\u65f6\u95f4\uff1a2010-10-29 01:29 | \u6211\u6765\u8bc4\u8bba
\u5411TA\u6c42\u52a9 \u56de\u7b54\u8005\uff1a WERTY78965 | \u4e00\u7ea7
\u64c5\u957f\u9886\u57df\uff1a \u6682\u672a\u5b9a\u5236
\u53c2\u52a0\u7684\u6d3b\u52a8\uff1a \u6682\u65f6\u6ca1\u6709\u53c2\u52a0\u7684\u6d3b\u52a8
\u76f8\u5173\u5185\u5bb9
2009-10-6 \u521d\u4e0030\u9053\u6709\u7406\u6570\u6df7\u5408\u8fd0\u7b97\u7ec3\u4e60\u9898\uff0c\u53ea\u8981\u8ba1\u7b97\u9898\uff0c\u4e0d\u8981\u4e58\u65b9\u7684 282
2010-2-11 \u6c42\u521d\u4e00\u8ba1\u7b97\u9898(\u89e3\u65b9\u7a0b+\u5316\u7b80\u6c42\u503c+\u6709\u7406\u6570\u6df7\u5408\u8fd0\u7b97)60\u9053\uff08\u540430\u9898\uff09 129
2011-3-17 \u6211\u8981\u521d\u4e00\u7684150\u9053\u8ba1\u7b97\u9898\u300160\u9053\u65b9\u7a0b\u300160\u9053\u6574\u5f0f\u8ba1\u7b97\u300130\u9053\u6709\u7406\u6570\u6df7\u5408\u8fd0\u7b97 16
2007-11-4 \u6211\u6025\u9700\u521d\u4e00\u7684\u6709\u7406\u6570\u6df7\u5408\u8fd0\u7b97\uff0c\u4e58\u65b9\u7b97\u5f0f\uff0c\u8c01\u6709\u554a\uff1f
2010-10-7 \u521d\u4e00\u627e30\u9053\u6570\u5b66\u8ba1\u7b97\u9898\u3002\uff08\u6709\u7406\u6570\u6df7\u5408\u8fd0\u7b97\uff09 \u4e0d\u8981\u7b54\u6848\uff0c\u53ea\u8981\u9898\u76ee\u5c31\u884c\u5566\uff01... 13
\u66f4\u591a\u5173\u4e8e70\u9053\u6709\u7406\u6570\u52a0\u51cf\u4e58\u9664\u4e58\u65b9\u6df7\u5408\u8fd0\u7b97\u7684\u9898\u7684\u95ee\u9898>>
\u67e5\u770b\u540c\u4e3b\u9898\u95ee\u9898\uff1a \u6709\u7406\u6570\u6df7\u5408\u8fd0\u7b97 \u8ba1\u7b97\u9898 \u521d\u4e00 \u4e58\u65b9
\u7b49\u5f85\u60a8\u6765\u56de\u7b540\u56de\u7b5415\u8c01\u6709\u5168\u7403\u70ed\u604b\u4e2d baby\u5531\u7684say goodbye \u7684\u5b8c\u6574P3\u7248\u554a \u4e0d\u8981\u91cc\u9762\u5e26\u6709\u7535\u5f71....0\u56de\u7b54\u8c01\u4e3a\u6211\u603b\u7ed3\u8d77\u51e1\u4e0e\u7231\u60c5\u7684\u53e5\u5b50\uff01\u5982\u7231\u60c5\u5c31\u50cf\u66f9\u4e15\u7684E\uff0c\u8ddd\u79bb\u8d8a\u8fdc\u4f24\u5bb3\u8d8a\u9ad8\uff01.0\u56de\u7b54\u7535\u89c6\u5267\u300a\u5bab\uff0e\u9501\u5fc3\u7389\u300b\u7684\u5927\u7ed3\u5c40\u662f\u4ec0\u4e48\uff1f.1\u56de\u7b5452011\u5e74\u97e9\u56fd\u7535\u5f71\u6392\u884c\u699c \u8c22\u8c22\uff01\u662f\u7535\u5f71\uff0c\u4e00\u6b21\u6027\u653e\u5b8c\u7684\u7535\u5f71\uff0c\u4e0d\u662f\u7535\u89c6\u5267\uff0c....0\u56de\u7b54\u82e5a\u4e3a\u6709\u7406\u6570,\u5728-a\u4e0ea\u4e4b\u95f4\u67091999\u4e2a\u6574\u6570,\u95eea\u7684\u53d6\u503c\u8303\u56f4\u662f\u4ec0\u4e48?.0\u56de\u7b54\u516b\u5144\u5f1f\u5206\u96c6\u5267\u60c5\u4ecb\u7ecd\u5728\u54ea\u513f\uff1f.0\u56de\u7b5410\u7535\u89c6\u5267\u300a\u7231\u60c5\u516c\u5bd3\u300b\u91cc\u6545\u4e8b\u63a5\u9f99\u90a3\u4e00\u96c6\uff0c\u5b50\u4e54\u8bf4\u7684\u90a3\u51e0\u9a82\u4eba\u7684\u201c\u4f60\u5988\u5988\u7684....0\u56de\u7b54\u4e5d\u6c5f\u5341\u4e8c\u574a\u56fd\u8bed28\u96c6 \u4e5d\u6c5f\u5341\u4e8c\u574a29\u96c6\u5267\u60c5\u4ecb\u7ecd tvb\u4e5d\u6c5f\u5341\u4e8c\u574a\u7ca4\u8bed30\u96c6\u4e0b\u8f7dcell.\u66f4\u591a\u7b49\u5f85\u60a8\u6765\u56de\u7b54\u7684\u95ee\u9898>>\u5176\u4ed6\u56de\u7b54 \u51713\u6761
1. 2100-21\u00d753+2255
2. (103-336\u00f721)\u00d715
3. 800-(2000-9600\u00f78)
4. 40\u00d748-(1472+328)\u00f75
5. (488+344)\u00f7(202-194)
6. 2940\u00f728+136\u00d77
7. 605\u00d7(500-494)-1898
8. (2886+6618)\u00f7(400-346)
9. 9125-(182+35\u00d722)
10. (154-76)\u00d7(38+49)
11. 3800-136\u00d79-798
12. (104+246)\u00d7(98\u00f77)
13. 918\u00f79\u00d7(108-99)
14. (8645+40\u00d740)\u00f75
15. (2944+864)\u00f7(113-79)
16. 8080-1877+1881\u00f73
17. (5011-43\u00d785)+3397
18. 2300-1122\u00f7(21-15)
19. 816\u00f7(4526-251\u00d718)
20. (7353+927)\u00f7(801-792)
21. (28+172)\u00f7(24+16)
22. 6240\u00f748+63\u00d748
23. 950-28\u00d76+666
24. 86\u00d7(35+117\u00f79)
25. 2500+(360-160\u00f74)
26. 16\u00d74\uff0b6\u00d73
27.39\u00f73\uff0b48\u00f76
28.24\u00d74\uff0d42\u00f73
29.7\u00d76-12\u00d73
30.56\u00f74\uff0b72\u00f78
31 (-1)^100*5+(-2)^4/4=
32 (-3)^3-3*(-1/3)^4=
33 (-10)^3+[(-4)^2-(1-3^2)*2=
34 4+(-2)^3*5-(-0.28)/4=
35 (-10^10*2+(-2)^3/4=
36 (-5)^3-3*(-1/2)^4
37 (-10)^4+[(-4)^2-(3+3^2)*2]=
*\u662f\u4e58\uff0c/\u662f\u9664\uff0c^\u662f\u6b21\u65b9
1.25*\uff08-3\uff09+70*\uff08-5\uff09+5*\uff08-3\uff09+25
2.9999*3+101*11*(101-92)
3.(23/4-3/4)*(3*6+2)
4. 3/7 \u00d7 49/9 - 4/3
5. 8/9 \u00d7 15/36 + 1/27
6. 12\u00d7 5/6 \u2013 2/9 \u00d73
7. 8\u00d7 5/4 + 1/4
8. 6\u00f7 3/8 \u2013 3/8 \u00f76
9. 4/7 \u00d7 5/9 + 3/7 \u00d7 5/9
10. 5/2 -\uff08 3/2 + 4/5 \uff09
11. 7/8 + \uff08 1/8 + 1/9 \uff09
12. 9 \u00d7 5/6 + 5/6
13. 3/4 \u00d7 8/9 - 1/3
14. 7 \u00d7 5/49 + 3/14
15. 6 \u00d7\uff08 1/2 + 2/3 \uff09
16. 8 \u00d7 4/5 + 8 \u00d7 11/5
17. 31 \u00d7 5/6 \u2013 5/6
18. 9/7 - \uff08 2/7 \u2013 10/21 \uff09
19. 5/9 \u00d7 18 \u2013 14 \u00d7 2/7
20. 4/5 \u00d7 25/16 + 2/3 \u00d7 3/4
21. 14 \u00d7 8/7 \u2013 5/6 \u00d7 12/15
22. 17/32 \u2013 3/4 \u00d7 9/24
23. 3 \u00d7 2/9 + 1/3
24. 5/7 \u00d7 3/25 + 3/7
25. 3/14 \u00d7\u00d7 2/3 + 1/6
26. 1/5 \u00d7 2/3 + 5/6
27. 9/22 + 1/11 \u00f7 1/2
28. 5/3 \u00d7 11/5 + 4/3
29. 45 \u00d7 2/3 + 1/3 \u00d7 15
30. 7/19 + 12/19 \u00d7 5/6
31. 1/4 + 3/4 \u00f7 2/3
32. 8/7 \u00d7 21/16 + 1/2
33. 101 \u00d7 1/5 \u2013 1/5 \u00d7 21
34.50\uff0b160\u00f740
35.120-144\u00f718+35
36.347+45\u00d72-4160\u00f752
37\uff0858+37\uff09\u00f7\uff0864-9\u00d75\uff09
38.95\u00f7\uff0864-45\uff09
39.178-145\u00f75\u00d76+42
40.812-700\u00f7\uff089+31\u00d711\uff09
41.85+14\u00d7\uff0814+208\u00f726\uff09
43.120-36\u00d74\u00f718+35
44.\uff0858+37\uff09\u00f7\uff0864-9\u00d75\uff09
45.(6.8-6.8\u00d70.55)\u00f78.5
46.0.12\u00d7 4.8\u00f70.12\u00d74.8
47.\uff083.2\u00d71.5+2.5\uff09\u00f71.6
48.6-1.6\u00f74= 5.38+7.85-5.37=
49.7.2\u00f70.8-1.2\u00d75= 6-1.19\u00d73-0.43=
50.6.5\u00d7\uff084.8-1.2\u00d74\uff09=
51.5.8\u00d7\uff083.87-0.13\uff09+4.2\u00d73.74
52.32.52-\uff086+9.728\u00f73.2\uff09\u00d72.5
53.[\uff087.1-5.6\uff09\u00d70.9-1.15] \u00f72.5
54.5.4\u00f7[2.6\u00d7\uff083.7-2.9\uff09+0.62]
55.12\u00d76\u00f7\uff0812-7.2\uff09-6
56.12\u00d76\u00f77.2-6
57.0.68\u00d71.9+0.32\u00d71.9
58.58+370\uff09\u00f7\uff0864-45\uff09
59.420+580-64\u00d721\u00f728
60.136+6\u00d7\uff0865-345\u00f723\uff09
15-10.75\u00d70.4-5.7
62.18.1\uff0b\uff083\uff0d0.299\u00f70.23\uff09\u00d71
63.(6.8-6.8\u00d70.55)\u00f78.5
64.0.12\u00d7 4.8\u00f70.12\u00d74.8
65.\uff083.2\u00d71.5+2.5\uff09\u00f71.6
66.3.2\u00d76+\uff081.5+2.5\uff09\u00f71.6
67.0.68\u00d71.9+0.32\u00d71.9
68.10.15-10.75\u00d70.4-5.7
69.5.8\u00d7\uff083.87-0.13\uff09+4.2\u00d73.74
70.32.52-\uff086+9.728\u00f73.2\uff09\u00d72.5
71.[\uff087.1-5.6\uff09\u00d70.9-1.15] \u00f72.5
72.5.4\u00f7[2.6\u00d7\uff083.7-2.9\uff09+0.62]
73.12\u00d76\u00f7\uff0812-7.2\uff09-6
74.12\u00d76\u00f77.2-6
75.33.02\uff0d\uff08148.4\uff0d90.85\uff09\u00f72.5
1) 76.(25%-695%-12%)*36
77./4*3/5+3/4*2/5
78.1-1/4+8/9/7/9
79.+1/6/3/24+2/21
80./15*3/5
81.3/4/9/10-1/6
82./3+1/2)/5/6-1/3]/1/7
83./5+3/5/2+3/4
84.(2-2/3/1/2)]*2/5
85.+5268.32-2569
86.3+456-52*8
87.5%+6325
88./2+1/3+1/4
2) 89+456-78
3) 5%+. 3/7 \u00d7 49/9 - 4/3
4) 9 \u00d7 15/36 + 1/27
5) 2\u00d7 5/6 \u2013 2/9 \u00d73
6) 3\u00d7 5/4 + 1/4
7) 94\u00f7 3/8 \u2013 3/8 \u00f76
8) 95/7 \u00d7 5/9 + 3/7 \u00d7 5/9
9) 6/2 -\uff08 3/2 + 4/5 \uff09
10) 8 + \uff08 1/8 + 1/9 \uff09
11) 8 \u00d7 5/6 + 5/6
12) 1/4 \u00d7 8/9 - 1/3
13) 10 \u00d7 5/49 + 3/14
14) 1.5 \u00d7\uff08 1/2 + 2/3 \uff09
15) 2\uff0f9 \u00d7 4/5 + 8 \u00d7 11/5
16) 3.1 \u00d7 5/6 \u2013 5/6
17) 4/7 - \uff08 2/7 \u2013 10/21 \uff09
18) 19 \u00d7 18 \u2013 14 \u00d7 2/7
19) 5 \u00d7 25/16 + 2/3 \u00d7 3/4
20) 4 \u00d7 8/7 \u2013 5/6 \u00d7 12/15
21) 7/32 \u2013 3/4 \u00d7 9/24
22) 1\u3001 2/3\u00f71/2\uff0d1/4\u00d72/5
2\u3001 2\uff0d6/13\u00f79/26\uff0d2/3
3\u3001 2/9\uff0b1/2\u00f74/5\uff0b3/8
4\u3001 10\u00f75/9\uff0b1/6\u00d74
5\u3001 1/2\u00d72/5\uff0b9/10\u00f79/20
6\u3001 5/9\u00d73/10\uff0b2/7\u00f72/5
7\u3001 1/2\uff0b1/4\u00d74/5\uff0d1/8
8\u3001 3/4\u00d75/7\u00d74/3\uff0d1/2
9\u3001 23\uff0d8/9\u00d71/27\u00f71/27
10\u3001 8\u00d75/6\uff0b2/5\u00f74
11\u3001 1/2\uff0b3/4\u00d75/12\u00d74/5
12\u3001 8/9\u00d73/4\uff0d3/8\u00f73/4
13\u3001 5/8\u00f75/4\uff0b3/23\u00f79/11
23) 1.2\u00d72.5+0.8\u00d72.5
24) 8.9\u00d71.25-0.9\u00d71.25
25) 12.5\u00d77.4\u00d70.8
26) 9.9\u00d76.4-\uff082.5+0.24\uff09\uff0827\uff09 6.5\u00d79.5+6.5\u00d70.5
0.35\u00d71.6+0.35\u00d73.4
0.25\u00d78.6\u00d74
6.72-3.28-1.72
0.45+6.37+4.55
5.4+6.9\u00d73-\uff0825-2.5\uff092\u00d741846-620-380
4.8\u00d746+4.8\u00d754
0.8+0.8\u00d72.5
1.25\u00d73.6\u00d78\u00d72.5-12.5\u00d72.4
28\u00d712.5-12.5\u00d720
23.65-\uff083.07+3.65\uff09
\uff084+0.4\u00d70.25\uff098\u00d77\u00d71.25
1.65\u00d799+1.65
27.85-\uff087.85+3.4\uff09
48\u00d71.25+50\u00d71.25\u00d70.2\u00d78
7.8\u00d79.9+0.78
(1010+309+4+681+6\uff09\u00d712
3\u00d79146\u00d7782\u00d76\u00d7854
5.15\u00d77/8+6.1-0.60625
1. 3/7 \u00d7 49/9 - 4/3
2. 8/9 \u00d7 15/36 + 1/27
3. 12\u00d7 5/6 \u2013 2/9 \u00d73
4. 8\u00d7 5/4 + 1/4
5. 6\u00f7 3/8 \u2013 3/8 \u00f76
6. 4/7 \u00d7 5/9 + 3/7 \u00d7 5/9
7. 5/2 -\uff08 3/2 + 4/5 \uff09
8. 7/8 + \uff08 1/8 + 1/9 \uff09
9. 9 \u00d7 5/6 + 5/6
10. 3/4 \u00d7 8/9 - 1/3
11. 7 \u00d7 5/49 + 3/14
12. 6 \u00d7\uff08 1/2 + 2/3 \uff09
13. 8 \u00d7 4/5 + 8 \u00d7 11/5
14. 31 \u00d7 5/6 \u2013 5/6
15. 9/7 - \uff08 2/7 \u2013 10/21 \uff09
16. 5/9 \u00d7 18 \u2013 14 \u00d7 2/7
17. 4/5 \u00d7 25/16 + 2/3 \u00d7 3/4
18. 14 \u00d7 8/7 \u2013 5/6 \u00d7 12/15
19. 17/32 \u2013 3/4 \u00d7 9/24
20. 3 \u00d7 2/9 + 1/3
21. 5/7 \u00d7 3/25 + 3/7
22. 3/14 \u00d7 2/3 + 1/6
23. 1/5 \u00d7 2/3 + 5/6
24. 9/22 + 1/11 \u00f7 1/2
25. 5/3 \u00d7 11/5 + 4/3
26. 45 \u00d7 2/3 + 1/3 \u00d7 15
27. 7/19 + 12/19 \u00d7 5/6
28. 1/4 + 3/4 \u00f7 2/3
29. 8/7 \u00d7 21/16 + 1/2
30. 101 \u00d7 1/5 \u2013 1/5 \u00d7 21
31.50\uff0b160\u00f740 \uff0858+370\uff09\u00f7\uff0864-45\uff09
32.120-144\u00f718+35
33.347+45\u00d72-4160\u00f752
34\uff0858+37\uff09\u00f7\uff0864-9\u00d75\uff09
35.95\u00f7\uff0864-45\uff09
36.178-145\u00f75\u00d76+42 420+580-64\u00d721\u00f728
37.812-700\u00f7\uff089+31\u00d711\uff09 \uff08136+64\uff09\u00d7\uff0865-345\u00f723\uff09
38.85+14\u00d7\uff0814+208\u00f726\uff09
39.\uff08284+16\uff09\u00d7\uff08512-8208\u00f718\uff09
40.120-36\u00d74\u00f718+35
41.\uff0858+37\uff09\u00f7\uff0864-9\u00d75\uff09
42.(6.8-6.8\u00d70.55)\u00f78.5
43.0.12\u00d7 4.8\u00f70.12\u00d74.8
44.\uff083.2\u00d71.5+2.5\uff09\u00f71.6 \uff082\uff093.2\u00d7\uff081.5+2.5\uff09\u00f71.6
45.6-1.6\u00f74= 5.38+7.85-5.37=
46.7.2\u00f70.8-1.2\u00d75= 6-1.19\u00d73-0.43=
47.6.5\u00d7\uff084.8-1.2\u00d74\uff09= 0.68\u00d71.9+0.32\u00d71.9
48.10.15-10.75\u00d70.4-5.7
49.5.8\u00d7\uff083.87-0.13\uff09+4.2\u00d73.74
50.32.52-\uff086+9.728\u00f73.2\uff09\u00d72.5
51.[\uff087.1-5.6\uff09\u00d70.9-1.15] \u00f72.5
52.5.4\u00f7[2.6\u00d7\uff083.7-2.9\uff09+0.62]
53.12\u00d76\u00f7\uff0812-7.2\uff09-6 \uff084\uff0912\u00d76\u00f77.2-6
102\u00d7(-4.5)-(-3)\u00d7(-5) \u00f72
7.8\u00d76.9\uff0b2.2\u00d76.9
(-2)+2-(-52)\u00d7(-1) \u00d75+87\u00f7(-3)\u00d7(-1)
5.6\u00d70.258\u00d7\uff0820\uff0d1.25\uff09
(-7.1) \u00d7\u3014(-3)\u00d7(-5)\u3015\u00f72
-2.5\u00d7(-4.8)\u00d7(0.09)\u00f7(-0.27)
127+352+73+44\u00d7(-2)
89\u00d7276+(-135)-33
25\u00d771+75\u00f729 -88\u00f7(-2)
243+89+111+57
9405-2940\u00f728\u00d721
920-1680\u00f740\u00f77
690+47\u00d752-398
148+3328\u00f764-75
360\u00d724\u00f732+730
2100-94+48\u00d754
51+\uff082304-2042\uff09\u00d723
4215+\uff084361-716\uff09\u00f781
\uff08247+18\uff09\u00d727\u00f725
36-720\u00f7\uff08360\u00f718\uff09
1080\u00f7\uff0863-54\uff09\u00d780
\uff08528+912\uff09\u00d75-6178
8528\u00f741\u00d738-904
264+318-8280\u00f769
\uff08174+209\uff09\u00d726- (9000^0)
814-\uff08278+322\uff09\u00f715
1406+735\u00d79\u00f745
3168-7828\u00f738+504
796-5040\u00f7\uff08630\u00f77\uff09
285+\uff083000-372\uff09\u00f736
1+5/6-19/12
3x(-9)+7x(-9)
(-54)x1/6x(-1/3)
1.18.1\uff0b\uff083\uff0d0.299\u00f70.23\uff09\u00d71
2.(6.8-6.8\u00d70.55)\u00f78.5
3.0.12\u00d7 4.8\u00f70.12\u00d74.84
3.2\u00d71.5+2.5\u00f7(-1.6)
\uff08-2\uff09\u00d73.2\u00d7\uff081.5+2.5\uff09\u00f71.6
5.6-1.6\u00f74+(6.8-9)
5.38+7.85-5.37\u00f789
6.7.2\u00f70.8-1.2\u00d75
6-1.19\u00d73-0.43
7.6.5\u00d7\uff084.8-1.2\u00d74\uff09
0.68\u00d71.9+0.32\u00d71.9
8.10.15-10.75\u00d70.4-5.7
9.5.8\u00d7\uff083.87-0.13\uff09
(-8.01)+4.2\u00d73.74
10.32.52-\uff086+9.728\u00f73.2\uff09\u00d72.5
11.[\uff087.1-5.6\uff09\u00d70.9-1.15] \u00f72.5
12.5.4\u00f7[2.6\u00d7\uff083.7-2.9\uff09+0.62]
13.12\u00d76\u00f7\uff0812-7.2\uff09-6
14.12\u00d76\u00f77.2-6
15.33.02\uff0d\uff08148.4\uff0d90.85\uff09\u00f72.5
(-5)-252\u00d7\uff08-78\uff09
(-6) \u00d7(-2)+3\u00f7\uff085+50\uff09
7-7+3-6-\uff08-90\uff09
(-8)(-3)\u00d7(-8)\u00d725
(7+13) \u00f7(-616)\u00f7(-28)
\uff088+14-100-27\uff09\u00f74
(-15) \u00f7(-1)-101\u00f710
16\u00f70.21\u00d7(-8) \u00d7(4.1+5.9)
(-10) \u00d7(-2) \u00d74\u00f7{-9\u00f7[6+(-5.67)]}
(-18)(-4)2\u00d7[8.01\u00d7(-3.14)
9-32{-890-[79+8.1] \u00d79}
(-20)-23+(-9) \u00d79.42
(-24)3.4\u00d7104\u00f7(-5) \u00d7200.96
[-|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) +\u221a9
2/(-2)+0/7-(-8)*(-2)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)*(-2) \u00d72^7
(5+3/8*8/30/(-2)- \u221a36
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
1+2+3+4+......+100000
1/1+1/2+1/3+......1/50
1+1/2+1/4+1/8+1/16+......1/512
3+9+27+81+243+......9999
1+1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90 \u56de\u7b54\u8005\uff1a 3656686zwb | \u4e00\u7ea7 | 2010-10-30 16:44
1.345x0.345x2.96-1.345\uff08\u76843\u6b21\u65b9\uff09-1.345x0.345\uff08\u76842\u6b21\u65b9\uff09
=-1.345(1.345^2-2*1.345*0.345+0.345^2)
=-1.345(1.345-0.345)^2
=-1.345
1+\uff08-2\uff09+3+(-4)+......+\uff08-1\uff09\uff08\u7684n+1\u6b21\u65b9\uff09*n
n\u4e3a\u5947\u6570
1+(-2)+3+(-4)+......+[(-1)\u7684n+1\u6b21\u65b9]n
=[1+(-2)]+[3+(-4)]+....+[(-1)\u7684n+1\u6b21\u65b9]n
=(-1+ -1+...+ )+n
=(1-n)/2+n
=(n+1)/2
n\u4e3a\u5076\u6570
1+(-2)+3+(-4)+5+(-6)+......+[(-1)^\uff08n+1\uff09]n
\uff1d1+(3-2)+(5-4)+(7-6)......+(n-1-\uff08n-2))+\uff08-n\uff09
\uff1dn/2-n
\uff1d-n/2
\u6211\u53ea\u6709\u516d\u5341\u9053\u4e86\uff0c\u5176\u4f59\u4f60\u518d\u627e\u627e\u5427
\u539f\u5f0f=18-\uff08-3\uff09\u00d7\uff08-1/3)
[(-3)^2-(-5)^2]\u00f7\uff08-2\uff09\u539f\u5f0f=\uff089-25\uff09\u00f7\uff08-2\uff09
(-2)^3\u00d70.5-\uff08-1.6\uff09^2\u00f7(-2)^2\u539f\u5f0f=\uff08-8\uff09\u00d7\uff081/2\uff09-\uff08-8/5\uff09^2\u00f74
\uff08-3/4\uff09\u00d7\uff08-8+2/3-1/3)\u539f\u5f0f=\uff08-3/4\uff09\u00d7\uff08-8+1/3\uff09
16\u00f7\uff08-2\uff09^3-\uff08-1/8\uff09\u00d7\uff08-4\uff09\u539f\u5f0f=16\u00f7\uff08-8\uff09-1/2
练习一(B级)
(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)
(二)用简便方法计算:
(1)(-17/4)+(-10/3)+(+13/3)+(11/3)
(2)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)
(三)已知:X=+17(3/4),Y=-9(5/11),Z=-2.25,
求:(-X)+(-Y)+Z的值
(四)用“>“,“0,则a-ba (C)若ba (D)若a<0,ba
(二)填空题:
(1)零减去a的相反数,其结果是_____________; (2)若a-b>a,则b是_____________数; (3)从-3.14中减去-π,其差应为____________; (4)被减数是-12(4/5),差是4.2,则减数应是_____________; (5)若b-a<-,则a,b的关系是___________,若a-b<0,则a,b的关系是______________; (6)(+22/3)-( )=-7
(三)判断题:
(1)一个数减去一个负数,差比被减数小. (2)一个数减去一个正数,差比被减数小. (3)0减去任何数,所得的差总等于这个数的相反数. (4)若X+(-Y)=Z,则X=Y+Z (5)若a<0,b|b|,则a-b>0
练习二(B级)
(一)计算:
(1)(+1.3)-(+17/7)
(2)(-2)-(+2/3)
(3)|(-7.2)-(-6.3)+(1.1)|
(4)|(-5/4)-(-3/4)|-|1-5/4-|-3/4|)
(二)如果|a|=4,|b|=2,且|a+b|=a+b,求a-b的值.
(三)若a,b为有理数,且|a|<|b|试比较|a-b|和|a|-|b|的大小
(四)如果|X-1|=4,求X,并在数轴上观察表示数X的点与表示1的点的距离.
练习三(A级)
(一)选择题:
(1)式子-40-28+19-24+32的正确读法是( )
(A)负40,负28,加19,减24与32的和 (B)负40减负28加19减负24加32 (C)负40减28加19减24加32 (D)负40负28加19减24减负32
(2)若有理数a+b+C<0,则( )
(A)三个数中最少有两个是负数 (B)三个数中有且只有一个负数 (C)三个数中最少有一个是负数 (D)三个数中有两个是正数或者有两个是负数
(3)若m<0,则m和它的相反数的差的绝对值是( )
(A)0 (B)m (C)2m (D)-2m
(4)下列各式中与X-y-Z诉值不相等的是( )
(A)X-(Y-Z) (B)X-(Y+Z) (C)(X-y)+(-z) (D)(-y)+(X-Z)
(二)填空题:
(1)有理数的加减混合运算的一般步骤是:(1)________;(2)_________;(3)________ _______;(4)__________________. (2)当b0,(a+b)(a-1)>0,则必有( ) (A)b与a同号 (B)a+b与a-1同号 (C)a>1 (D)b1 (6)一个有理数和它的相反数的积( ) (A)符号必为正 (B)符号必为负 (C)一不小于零 (D)一定不大于零 (7)若|a-1|*|b+1|=0,则a,b的值( ) (A)a=1,b不可能为-1 (B)b=-1,a不可能为1 (C)a=1或b=1 (D)a与b的值相等 (8)若a*B*C=0,则这三个有理数中( ) (A)至少有一个为零 (B)三个都是零 (C)只有一个为零 (D)不可能有两个以上为零
(二)填空题:
(1)有理数乘法法则是:两数相乘,同号__________,异号_______________,并把绝对值_____, 任何数同零相乘都得__________________. (2)若四个有理数a,b,c,d之积是正数,则a,b,c,d中负数的个数可能是______________; (3)计算(-2/199)*(-7/6-3/2+8/3)=________________; (4)计算:(4a)*(-3b)*(5c)*1/6=__________________; (5)计算:(-8)*(1/2-1/4+2)=-4-2+16=10的错误是___________________; (6)计算:(-1/6)*(-6)*(10/7)*(-7/10)=[(-1/6)*(-6)][(+10/7)*(-7/10)]=-1的根据是_______
(三)判断题:
(1)两数之积为正,那么这两数一定都是正数; (2)两数之积为负,那么这两个数异号; (3)几个有理数相乘,当因数有偶数个时,积为正; (4)几个有理数相乘,当积为负数时,负因数有奇数个; (5)积比每个因数都大.
练习(四)(B级)
(一)计算题:
(1)(-4)(+6)(-7)
(2)(-27)(-25)(-3)(-4)
(3)0.001*(-0.1)*(1.1)
(4)24*(-5/4)*(-12/15)*(-0.12)
(5)(-3/2)(-4/3)(-5/4)(-6/5)(-7/6)(-8/7)
(6)(-24/7)(11/8+7/3-3.75)*24
(二)用简便方法计算:
(1)(-71/8)*(-23)-23*(-73/8)
(2)(-7/15)*(-18)*(-45/14)
(3)(-2.2)*(+1.5)*(-7/11)*(-2/7)
(三)当a=-4,b=-3,c=-2,d=-1时,求代数式(ab+cd)(ab-cd)的值.
(四)已知1+2+3+......+31+32+33=17*33,计算下式
1-3+2-6+3-9-12+...+31-93+32-96+33-99的值
练习五(A级)
(一)选择题:
(1)已知a,b是两个有理数,如果它们的商a/b=0,那么( )
(A)a=0且b≠0 (B)a=0 (C)a=0或b=0 (D)a=0或b≠0
(2)下列给定四组数1和1;-1和-1;0和0;-2/3和-3/2,其中互为倒数的是( )
(A)只有 (B)只有 (C)只有 (D)都是
(3)如果a/|b|(b≠0)是正整数,则( )
(A)|b|是a的约数 (B)|b|是a的倍数 (C)a与b同号 (D)a与b异号
(4)如果a>b,那么一定有( )
(A)a+b>a (B)a-b>a (C)2a>ab (D)a/b>1
(二)填空题:
(1)当|a|/a=1时,a______________0;当|a|/a=-1时,a______________0;(填>,0,则a___________0; (11)若ab/c0,则b___________0; (12)若a/b>0,b/c(-0.3)4>-106 (B)(-0.3)4>-106>(-0.2)3 (C)-106>(-0.2)3>(-0.3)4 (D)(-0.3)4>(-0.2)3>-106 (4)若a为有理数,且a2>a,则a的取值范围是( ) (A)a<0 (B)0<1 (C)a1 (D)a>1或a<0 (5)下面用科学记数法表示106000,其中正确的是( ) (A)1.06*105 (B)10.6*105 (C)1.06*106 (D)0.106*107 (6)已知1.2363=1.888,则123.63等于( ) (A)1888 (B)18880 (C)188800 (D)1888000 (7)若a是有理数,下列各式总能成立的是( ) (A)(-a)4=a4 (B)(-a)3=A4 (C)-a4=(-a)4 (D)-a3=a3 (8)计算:(-1)1-(-2)2-(-3)3-(-4)4所得结果是( ) (A)288 (B)-288 (C)-234 (D)280
(二)填空题:
(1)在23中,3是________,2是_______,幂是________;若把3看作幂,则它的底数是________,
指数是________; (2)根据幂的意义:(-2)3表示________相乘; (-3)2v表示________相乘;-23表示________. (3)平方等于36/49的有理数是________;立方等于-27/64的数是________ (4)把一个大于10的正数记成a*10n(n为正整数)的形成,a的范围是________,这里n比原来的整
数位数少_________,这种记数法称为科学记数法; (5)用科学记数法记出下面各数:4000=___________;950000=________________;地球
的质量约为49800...0克(28位),可记为________; (6)下面用科学记数法记出的数,原来各为多少 105=_____________;2*105=______________; 9.7*107=______________9.756*103=_____________ (7)下列各数分别是几位自然数 7*106是______位数 1.1*109是________位数; 3.78*107是______位数 1010是________位数; (8)若有理数m 0,b0 (B)a-|b|>0 (C)a2+b3>0 (D)a<0 (6)代数式(a+2)2+5取得最小值时的a值为( ) (A)a=0 (B)a=2 (C)a=-2 (D)a0 (B)b-a>0 (C)a,b互为相反数; (D)-ab (C)a
(5)用四舍五入法得到的近似数1.20所表示的准确数a的范围是( )
(A)1.195≤a<1.205 (B)1.15≤a<1.18 (C)1.10≤a<1.30 (D)1.200≤a<1.205 (6)下列说法正确的是( ) (A)近似数3.80的精确度与近似数38的精确度相同; (B)近似数38.0与近似数38的有效数字个数一样 (C)3.1416精确到百分位后,有三个有效数字3,1,4; (D)把123*102记成1.23*104,其有效数字有四个.
(二)填空题:
(1)写出下列由四舍五入得到的近似值数的精确度与有效数字: (1)近似数85精确到________位,有效数字是________; (2)近似数3万精确到______位,有效数字是________; (3)近似数5200千精确到________,有效数字是_________; (4)近似数0.20精确到_________位,有效数字是_____________. (2)设e=2.71828......,取近似数2.7是精确到__________位,有_______个有效数字;
取近似数2.7183是精确到_________位,有_______个有效数字. (3)由四舍五入得到π=3.1416,精确到0.001的近似值是π=__________; (4)3.1416保留三个有效数字的近似值是_____________;
(三)判断题:
(1)近似数25.0精确以个痊,有效数字是2,5; (2)近似数4千和近似数4000的精确程度一样; (3)近似数4千和近似数4*10^3的精确程度一样; (4)9.949精确到0.01的近似数是9.95.
练习八(B级)
(一)用四舍五入法对下列各数取近似值(要求保留三个有效数字): (1)37.27 (2)810.9 (3)0.0045078 (4)3.079
(二)用四舍五入法对下列各数取近似值(要求精确到千位): (1)37890.6 (2)213612.4 (3)1906.57
(三)计算(结果保留两个有效数字): (1)3.14*3.42 (2)972*3.14*1/4
练习九
(一)查表求值:
(1)7.042 (2)2.482 (3)9.52 (4)2.0012 (5)123.42 (6)0.12342 (7)1.283 (8)3.4683 (9)(-0.5398)3 (10)53.733
(二)已知2.4682=6.901,不查表求24.682与0.024682的值
(三)已知5.2633=145.7,不查表求
(1)0.52633 (2)0.05263 (3)52.632 (4)52633
(四)已知21.762^2=473.5,那么0.0021762是多少 保留三个有效数字的近似值是多少
(五)查表计算:半径为77cm的球的表面积.(球的面积=4π*r2)
参考资料：仅供参考，祝你学习进步！
3+2^2×（-1/5）
解：原式=3+4×（-1/5)
=3-4/5
=11/5
18-6÷（-2）×（-1/3）
解：原式=18-（-3）×（-1/3)
=18-1
=17
（-3）^2×[-2/3+（-5/9）]
解：原式=9×（-11/9）
=-11
8+（-3）^2×（-2）
解：原式=8+9×（-2）
=8-18
=-10
100÷（-2）^2-（-2）÷（-2/3）
解：原式=100÷4-3
=25-3
=22
36×（1/2-1/3)^2
解：原式=36×（1/6）^2
=36×（1/36）
=1
12.7÷（-8/19）×0
解：原式=0
4×（-3）^2+6
解：原式=4×9+6
=36+6
=42
（-3/4）×（-8+2/3-1/3)
解：原式=（-3/4）×（-8+1/3）
=（-3/4）×（-23/3)
=23/4
（-2）^3-13÷（-1/2）
解：原式=（-8）-（-26）
=18
0-2^3÷（-4）^3-1/8
解：原式=0-8÷（-64）-1/8
=0+1/8-1/8
=0
(-2)^3×0.5-（-1.6）^2÷(-2)^2
解：原式=（-8）×（1/2）-（-8/5）^2÷4
=（-4）-（64/25）÷4
=（-4）-16/25
=-116/25
(-3/2)×[（-2/3）^2-2]
解：原式=（-3/2）×(4/9-2)
=（-3/2）×（-14/9）
=7/3
[(-3)^2-(-5)^2]÷（-2）
解：原式=（9-25）÷（-2）
=（-16）÷（-2）
=8
16÷（-2）^3-（-1/8）×（-4）
解：原式=16÷（-8）-1/2
=-2-1/2
=-5/2
[(-3)^2-(-5)^2]÷（-2）
解：原式=（9-25）÷（-2）
=（-16）÷（-2）
=8
3+2^2×（-1/5）
解：原式=3+4×（-1/5)
=3-4/5
=11/5
18-6÷（-2）×（-1/3）
解：原式=18-（-3）×（-1/3)
=18-1
=17
（-3）^2×[-2/3+（-5/9）]
解：原式=9×（-11/9）
=-11
8+（-3）^2×（-2）
解：原式=8+9×（-2）
=8-18
=-10
100÷（-2）^2-（-2）÷（-2/3）
解：原式=100÷4-3
=25-3
=22
36×（1/2-1/3)^2
解：原式=36×（1/6）^2
=36×（1/36）
=1
12.7÷（-8/19）×0
解：原式=0
4×（-3）^2+6
解：原式=4×9+6
=36+6
=42
（-3/4）×（-8+2/3-1/3)
解：原式=（-3/4）×（-8+1/3）
=（-3/4）×（-23/3)
=23/4
（-2）^3-13÷（-1/2）
解：原式=（-8）-（-26）
=18
0-2^3÷（-4）^3-1/8
解：原式=0-8÷（-64）-1/8
=0+1/8-1/8
=0
(-2)^3×0.5-（-1.6）^2÷(-2)^2
解：原式=（-8）×（1/2）-（-8/5）^2÷4
=（-4）-（64/25）÷4
=（-4）-16/25
=-116/25
(-3/2)×[（-2/3）^2-2]
解：原式=（-3/2）×(4/9-2)
=（-3/2）×（-14/9）
=7/3
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绛旓細79.+1/6/3/24+2/21 80./15*3/5
绛旓細15.(2944+864)梅(113-79)涓鍏冧竴娆℃柟绋嬶細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 ...
绛旓細15. (2944+864)梅(113-79)涓鍏冧竴娆℃柟绋嬶細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....
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绛旓細(15)(-2/199)*(-7/6-3/2+8/3)(16)4a)*(-3b)*(5c)*1/6 杩樻湁50閬撻锛屼笉杩囨病鏈夌瓟妗 1. 3/7 脳 49/9 - 4/3 2. 8/9 脳 15/36 + 1/27 3. 12脳 5/6 鈥 2/9 脳3 4. 8脳 5/4 + 1/4 5. 6梅 3/8 鈥 3/8 梅6 6. 4/7 脳 5/9 + 3/7 脳 5/9 7...
绛旓細甯繖鎵惧垵涓涓50閬撳甫鍔犲噺涔橀櫎鐨鏈夌悊鏁娣峰悎杩愮畻 鎴戣繖鍎夸粈涔堥閮芥湁,浣犺閭ｉ亾鑷繁鎵!涓瀹氳閫夋垜涓烘渶浣崇瓟妗堝憖,鍛靛懙,澶氱粰鐐瑰垎 1.125*3+125*5+25*3+25 2.9999*3+101*11*(101-92) 3.(23/4-3/4)*(3*6+2) 4. 3/7 脳 49/9 - 4/3 5. 8/9 脳 15/36 + 1/27 6. 12脳 5/6 鈥 2/9 脳...
