初一有理数口算题 初一有理数口算题100道
\u6709\u521d\u4e00\u6709\u7406\u6570\u8ba1\u7b97\u9898\uff08\u6211\u89811000\u9053\u5e26\u7b54\u6848\u5317\u5e08\u5927\u7248 \u521d\u4e00\u6570\u5b66\u6709\u7406\u6570\u8ba1\u7b97\u9898\u53ca\u7b54\u6848\u6025\u9700\uff01\uff01\uff01\uff01
\u60ac\u8d4f\u5206\uff1a0 - \u63d0\u95ee\u65f6\u95f42008-10-3 17:10
\u5e26\u7b54\u6848\uff0c\u6700\u597d\u662f\u8d1f\u6570\u4e0e\u6b63\u6570\u7684\u52a0\u51cf
\u63d0\u95ee\u8005\uff1a \u6d41\u6d6a\u513f\u8d70 - \u8bd5\u7528\u671f \u4e00\u7ea7
\u5176\u4ed6\u56de\u7b54 \u5171 3 \u6761
\u521d\u4e00\u6570\u5b66\u6709\u7406\u6570\u7684\u6df7\u5408\u8fd0\u7b97\u7ec3\u4e60
\u3010\u540c\u6b65\u8fbe\u7eb2\u7ec3\u4e60\u3011\uff08\u65f6\u95f445\u5206\u949f\uff0c\u6ee1\u5206100\u5206\uff09
1\uff0e\u8ba1\u7b97\u9898\uff1a\uff0810\u2032\u00d75=50\u2032\uff09
\uff081\uff093\uff0e28-4\uff0e76+1 - \uff1b
\uff082\uff092\uff0e75-2 -3 +1 \uff1b
\uff083\uff0942\u00f7\uff08-1 \uff09-1 \u00f7\uff08-0.125\uff09;
\uff084\uff09(-48) \u00f782-(-25) \u00f7(-6)2;
\uff085\uff09- +( )\u00d7(-2.4).
2.\u8ba1\u7b97\u9898\uff1a\uff0810\u2032\u00d75=50\u2032\uff09
\uff081\uff09-23\u00f71 \u00d7\uff08-1 \uff092\u00f7\uff081 \uff092\uff1b
\uff082\uff09-14-\uff082-0.5\uff09\u00d7 \u00d7[( )2-( )3];
\uff083\uff09-1 \u00d7[1-3\u00d7(- )2]-( )2\u00d7(-2)3\u00f7(- )3
\uff084\uff09(0.12+0.32) \u00f7 [-22+(-3)2-3 \u00d7 ];
(5)-6.24\u00d732+31.2\u00d7(-2)3+(-0.51) \u00d7624.
\u3010\u7d20\u8d28\u4f18\u5316\u8bad\u7ec3\u3011
1.\u586b\u7a7a\u9898\uff1a
(1)\u5982\u662f \uff0c\u90a3\u4e48ac 0\uff1b\u5982\u679c \uff0c\u90a3\u4e48ac 0;
(2)\u82e5 \uff0c\u5219abc= ; -a2b2c2= ;
(3)\u5df2\u77e5a\uff0cb\u4e92\u4e3a\u76f8\u53cd\u6570\uff0cc\uff0cd\u4e92\u4e3a\u5012\u6570\uff0cx\u7684\u7edd\u5bf9\u503c\u7b49\u4e8e2\uff0c\u90a3\u4e48x2-(a+b)+cdx= .
2\uff0e\u8ba1\u7b97\uff1a
\uff081\uff09-32-
\uff082\uff09{1+[ ]\u00d7(-2)4}\u00f7(- );
\uff083\uff095-3\u00d7{-2+4\u00d7[-3\u00d7(-2)2-(-4) \u00f7(-1)3]-7}.
\u3010\u751f\u6d3b\u5b9e\u9645\u8fd0\u7528\u3011
\u7532\u75281000\u5143\u4eba\u6c11\u5e01\u8d2d\u4e70\u4e86\u4e00\u624b\u80a1\u7968\uff0c\u968f\u5373\u4ed6\u5c06\u8fd9\u624b\u80a1\u7968\u8f6c\u5356\u7ed9\u4e59\uff0c\u83b7\u522910%\uff0c\u800c\u540e\u4e59\u53c8\u5c06\u8fd9\u624b\u80a1\u7968\u53cd\u5356\u7ed9\u7532\uff0c\u4f46\u4e59\u635f\u5931\u4e8610%.\u6700\u540e\u7532\u6309\u4e59\u5356\u7ed9\u7532\u7684\u4ef7\u683c\u7684\u4e5d\u6298\u5c06\u8fd9\u624b\u80a1\u7968\u5356\u7ed9\u4e86\u4e59\uff0c\u5728\u4e0a\u8ff0\u80a1\u7968\u4ea4\u6613\u4e2d\uff08 \uff09
A\uff0e\u7532\u521a\u597d\u4e8f\u76c8\u5e73\u8861\uff1b B\uff0e\u7532\u76c8\u52291\u5143\uff1b
C\uff0e\u7532\u76c8\u52299\u5143\uff1b D\uff0e\u7532\u4e8f\u672c1.1\u5143.
\u53c2\u8003\u7b54\u6848\uff1a
\u3010\u540c\u6b65\u8fbe\u7eb2\u7ec3\u4e60\u3011
1\uff0e\uff081\uff09-0.73 \uff082\uff09-1 ; \uff083\uff09-14; \uff084\uff09- ; \uff085\uff09-2.9
2\uff0e(1)-3 (2)-1 ; (3)- ; (4)1; (5)-624.
\u3010\u7d20\u8d28\u4f18\u5316\u8bad\u7ec3\u3011
1.(1)>\uff0c>; (2)24\uff0c-576; (3)2\u62166.[\u63d0\u793a\uff1a\u2235 =2 \u2234x2=4\uff0cx=\u00b12]. 2.(1)-31; (2)-8 (3)224
\u3010\u751f\u6d3b\u5b9e\u9645\u8fd0\u7528\u3011 B
\u53c2\u8003\u8d44\u6599\uff1a http://edu.jx163.com/edu2/test/attche/site327/20070124/00e04c793857072105990c.doc
\u56de\u7b54\u8005\uff1a \u6702\u00e0\u00ec\u8fd8\u9048\u54f2 - \u8bd5\u7528\u671f \u4e00\u7ea7 10-4 10:07
75\u00f7\u3014138\u00f7\uff08100-54\uff09\u3015 85\u00d7(95\uff0d1440\u00f724)
80400\uff0d(4300\uff0b870\u00f715) 240\u00d778\u00f7\uff08154-115\uff09
1437\u00d727\uff0b27\u00d7563 \u301475-\uff0812+18\uff09\u3015\u00f715
2160\u00f7\u3014\uff0883-79\uff09\u00d718\u3015 280\uff0b840\u00f724\u00d75
325\u00f713\u00d7(266\uff0d250) 85\u00d7(95\uff0d1440\u00f724)
58870\u00f7(105\uff0b20\u00d72) 1437\u00d727\uff0b27\u00d7563
81432\u00f7(13\u00d752\uff0b78) [37.85-\uff087.85+6.4\uff09] \u00d730
156\u00d7[(17.7-7.2)\u00f73] \uff08947\uff0d599\uff09\uff0b76\u00d764
36\u00d7(913\uff0d276\u00f723) [192\uff0d\uff0854\uff0b38\uff09]\u00d767
[\uff087.1-5.6\uff09\u00d70.9-1.15]\u00f72.5 81432\u00f7(13\u00d752\uff0b78)
5.4\u00f7[2.6\u00d7\uff083.7-2.9\uff09+0.62] \uff08947\uff0d599\uff09\uff0b76\u00d764 60\uff0d(9.5\uff0b28.9)]\u00f70.18 2.881\u00f70.43\uff0d0.24\u00d73.5 20\u00d7[(2.44\uff0d1.8)\u00f70.4\uff0b0.15] 28-(3.4 1.25\u00d72.4) 0.8\u00d7\u301415.5-(3.21 5.79)\u3015 \uff0831.8 3.2\u00d74\uff09\u00f75 194\uff0d64.8\u00f71.8\u00d70.9 36.72\u00f74.25\u00d79.9 3.416\u00f7\uff080.016\u00d735\uff09 0.8\u00d7[(10\uff0d6.76)\u00f71.2]
\uff08136+64\uff09\u00d7\uff0865-345\u00f723\uff09 (6.8-6.8\u00d70.55)\u00f78.5
0.12\u00d7 4.8\u00f70.12\u00d74.8 \uff0858+37\uff09\u00f7\uff0864-9\u00d75\uff09
812-700\u00f7\uff089+31\u00d711\uff09 \uff083.2\u00d71.5+2.5\uff09\u00f71.6
85+14\u00d7\uff0814+208\u00f726\uff09 120-36\u00d74\u00f718+35
\uff08284+16\uff09\u00d7\uff08512-8208\u00f718\uff09 9.72\u00d71.6-18.305\u00f77
4/7\u00f7[1/3\u00d7\uff083/5-3/10\uff09] \uff084/5+1/4\uff09\u00f77/3+7/10
12.78\uff0d0\u00f7\uff08 13.4\uff0b156.6 \uff09 37.812-700\u00f7\uff089+31\u00d711\uff09 \uff08136+64\uff09\u00d7\uff0865-345\u00f723\uff09 3.2\u00d7\uff081.5+2.5\uff09\u00f71.6
85+14\u00d7\uff0814+208\u00f726\uff09 \uff0858+37\uff09\u00f7\uff0864-9\u00d75\uff09
(6.8-6.8\u00d70.55)\u00f78.5 \uff08284+16\uff09\u00d7\uff08512-8208\u00f718\uff09
0.12\u00d7 4.8\u00f70.12\u00d74.8 \uff083.2\u00d71.5+2.5\uff09\u00f71.6
120-36\u00d74\u00f718+35 10.15-10.75\u00d70.4-5.7
5.8\u00d7\uff083.87-0.13\uff09+4.2\u00d73.74 347+45\u00d72-4160\u00f752
32.52-\uff086+9.728\u00f73.2\uff09\u00d72.5 87\uff0858+37\uff09\u00f7\uff0864-9\u00d75\uff09
[\uff087.1-5.6\uff09\u00d70.9-1.15] \u00f72.5 \uff083.2\u00d71.5+2.5\uff09\u00f71.6
5.4\u00f7[2.6\u00d7\uff083.7-2.9\uff09+0.62] 12\u00d76\u00f7\uff0812-7.2\uff09-6
3.2\u00d76+\uff081.5+2.5\uff09\u00f71.6 \uff083.2\u00d71.5+2.5\uff09\u00f71.6
5.8\u00d7\uff083.87-0.13\uff09+4.2\u00d73.74
33.02\uff0d\uff08148.4\uff0d90.85\uff09\u00f72.5
\u56de\u7b54\u8005\uff1a 754791551 - \u9b54\u6cd5\u5b66\u5f92 \u4e00\u7ea7 10-5 13:26
(\u4e00)\u8ba1\u7b97\u9898:
(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
\u8fd8\u670950\u9053\u9898\uff0c\u4e0d\u8fc7\u6ca1\u6709\u7b54\u6848
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
0.12\u03c7\uff0b1.8\u00d70.9=7.2 (9\uff0d5\u03c7)\u00d70.3=1.02 6.4\u03c7-\u03c7=28+4.4
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\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.-5+58+13+90+78-(-56)+50
52.-7*2-57/(3
53.(-7)*2/(1/3)+79/(3+6/4\uff09
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)
(\u4e8c)\u586b\u7a7a\u9898:
(1)\u96f6\u51cf\u53bba\u7684\u76f8\u53cd\u6570,\u5176\u7ed3\u679c\u662f_____________; (2)\u82e5a-b>a,\u5219b\u662f_____________\u6570; (3)\u4ece-3.14\u4e2d\u51cf\u53bb-\u03c0,\u5176\u5dee\u5e94\u4e3a____________; (4)\u88ab\u51cf\u6570\u662f-12(4/5),\u5dee\u662f4.2,\u5219\u51cf\u6570\u5e94\u662f_____________; (5)\u82e5b-a<-,\u5219a,b\u7684\u5173\u7cfb\u662f___________,\u82e5a-b<0,\u5219a,b\u7684\u5173\u7cfb\u662f______________; (6)(+22/3)-( )=-7
(\u4e09)\u5224\u65ad\u9898:
(1)\u4e00\u4e2a\u6570\u51cf\u53bb\u4e00\u4e2a\u8d1f\u6570,\u5dee\u6bd4\u88ab\u51cf\u6570\u5c0f. (2)\u4e00\u4e2a\u6570\u51cf\u53bb\u4e00\u4e2a\u6b63\u6570,\u5dee\u6bd4\u88ab\u51cf\u6570\u5c0f. (3)0\u51cf\u53bb\u4efb\u4f55\u6570,\u6240\u5f97\u7684\u5dee\u603b\u7b49\u4e8e\u8fd9\u4e2a\u6570\u7684\u76f8\u53cd\u6570. (4)\u82e5X+(-Y)=Z,\u5219X=Y+Z (5)\u82e5a0
\u4e00)\u9009\u62e9\u9898:
(1)\u5df2\u77e5a,b\u662f\u4e24\u4e2a\u6709\u7406\u6570,\u5982\u679c\u5b83\u4eec\u7684\u5546a/b=0,\u90a3\u4e48( ) (A)a=0\u4e14b\u22600 (B)a=0 (C)a=0\u6216b=0 (D)a=0\u6216b\u22600 (2)\u4e0b\u5217\u7ed9\u5b9a\u56db\u7ec4\u65701\u548c1;-1\u548c-1;0\u548c0;-2/3\u548c-3/2,\u5176\u4e2d\u4e92\u4e3a\u5012\u6570\u7684\u662f( ) (A)\u53ea\u6709 (B)\u53ea\u6709 (C)\u53ea\u6709 (D)\u90fd\u662f (3)\u5982\u679ca/|b|(b\u22600)\u662f\u6b63\u6574\u6570,\u5219( ) (A)|b|\u662fa\u7684\u7ea6\u6570 (B)|b|\u662fa\u7684\u500d\u6570 (C)a\u4e0eb\u540c\u53f7 (D)a\u4e0eb\u5f02\u53f7 (4)\u5982\u679ca>b,\u90a3\u4e48\u4e00\u5b9a\u6709( ) (A)a+b>a (B)a-b>a (C)2a>ab (D)a/b>1
(\u4e8c)\u586b\u7a7a\u9898:
(1)\u5f53|a|/a=1\u65f6,a______________0;\u5f53|a|/a=-1\u65f6,a______________0;(\u586b>,0,\u5219a___________0; (11)\u82e5ab/c0,\u5219b___________0; (12)\u82e5a/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)\u82e5a\u4e3a\u6709\u7406\u6570,\u4e14a2>a,\u5219a\u7684\u53d6\u503c\u8303\u56f4\u662f( ) (A)a1\u6216a<0 (5)\u4e0b\u9762\u7528\u79d1\u5b66\u8bb0\u6570\u6cd5\u8868\u793a106000,\u5176\u4e2d\u6b63\u786e\u7684\u662f( ) (A)1.06*105 (B)10.6*105 (C)1.06*106 (D)0.106*107 (6)\u5df2\u77e51.2363=1.888,\u5219123.63\u7b49\u4e8e( ) (A)1888 (B)18880 (C)188800 (D)1888000 (7)\u82e5a\u662f\u6709\u7406\u6570,\u4e0b\u5217\u5404\u5f0f\u603b\u80fd\u6210\u7acb\u7684\u662f( ) (A)(-a)4=a4 (B)(-a)3=A4 (C)-a4=(-a)4 (D)-a3=a3 (8)\u8ba1\u7b97:(-1)1-(-2)2-(-3)3-(-4)4\u6240\u5f97\u7ed3\u679c\u662f( ) (A)288 (B)-288 (C)-234 (D)280
(\u4e8c)\u586b\u7a7a\u9898:
(1)\u572823\u4e2d,3\u662f________,2\u662f_______,\u5e42\u662f________;\u82e5\u628a3\u770b\u4f5c\u5e42,\u5219\u5b83\u7684\u5e95\u6570\u662f________,
\u6307\u6570\u662f________; (2)\u6839\u636e\u5e42\u7684\u610f\u4e49:(-2)3\u8868\u793a________\u76f8\u4e58; (-3)2v\u8868\u793a________\u76f8\u4e58;-23\u8868\u793a________. (3)\u5e73\u65b9\u7b49\u4e8e36/49\u7684\u6709\u7406\u6570\u662f________;\u7acb\u65b9\u7b49\u4e8e-27/64\u7684\u6570\u662f________ (4)\u628a\u4e00\u4e2a\u5927\u4e8e10\u7684\u6b63\u6570\u8bb0\u6210a*10n(n\u4e3a\u6b63\u6574\u6570)\u7684\u5f62\u6210,a\u7684\u8303\u56f4\u662f________,\u8fd9\u91ccn\u6bd4\u539f\u6765\u7684\u6574
\u6570\u4f4d\u6570\u5c11_________,\u8fd9\u79cd\u8bb0\u6570\u6cd5\u79f0\u4e3a\u79d1\u5b66\u8bb0\u6570\u6cd5; (5)\u7528\u79d1\u5b66\u8bb0\u6570\u6cd5\u8bb0\u51fa\u4e0b\u9762\u5404\u6570:4000=___________;950000=________________;\u5730\u7403
\u7684\u8d28\u91cf\u7ea6\u4e3a49800...0\u514b(28\u4f4d),\u53ef\u8bb0\u4e3a________; (6)\u4e0b\u9762\u7528\u79d1\u5b66\u8bb0\u6570\u6cd5\u8bb0\u51fa\u7684\u6570,\u539f\u6765\u5404\u4e3a\u591a\u5c11 105=_____________;2*105=______________; 9.7*107=______________9.756*103=_____________ (7)\u4e0b\u5217\u5404\u6570\u5206\u522b\u662f\u51e0\u4f4d\u81ea\u7136\u6570 7*106\u662f______\u4f4d\u6570 1.1*109\u662f________\u4f4d\u6570; 3.78*107\u662f______\u4f4d\u6570 1010\u662f________\u4f4d\u6570; (8)\u82e5\u6709\u7406\u6570m 0,b0 (B)a-|b|>0 (C)a2+b3>0 (D)a0 (C)a,b\u4e92\u4e3a\u76f8\u53cd\u6570; (D)-ab (C)a
(5)\u7528\u56db\u820d\u4e94\u5165\u6cd5\u5f97\u5230\u7684\u8fd1\u4f3c\u65701.20\u6240\u8868\u793a\u7684\u51c6\u786e\u6570a\u7684\u8303\u56f4\u662f( )
(A)1.195\u2264a<1.205 (B)1.15\u2264a<1.18 (C)1.10\u2264a<1.30 (D)1.200\u2264a<1.205 (6)\u4e0b\u5217\u8bf4\u6cd5\u6b63\u786e\u7684\u662f( ) (A)\u8fd1\u4f3c\u65703.80\u7684\u7cbe\u786e\u5ea6\u4e0e\u8fd1\u4f3c\u657038\u7684\u7cbe\u786e\u5ea6\u76f8\u540c; (B)\u8fd1\u4f3c\u657038.0\u4e0e\u8fd1\u4f3c\u657038\u7684\u6709\u6548\u6570\u5b57\u4e2a\u6570\u4e00\u6837 (C)3.1416\u7cbe\u786e\u5230\u767e\u5206\u4f4d\u540e,\u6709\u4e09\u4e2a\u6709\u6548\u6570\u5b573,1,4; (D)\u628a123*102\u8bb0\u62101.23*104,\u5176\u6709\u6548\u6570\u5b57\u6709\u56db\u4e2a.
(\u4e8c)\u586b\u7a7a\u9898:
(1)\u5199\u51fa\u4e0b\u5217\u7531\u56db\u820d\u4e94\u5165\u5f97\u5230\u7684\u8fd1\u4f3c\u503c\u6570\u7684\u7cbe\u786e\u5ea6\u4e0e\u6709\u6548\u6570\u5b57: (1)\u8fd1\u4f3c\u657085\u7cbe\u786e\u5230________\u4f4d,\u6709\u6548\u6570\u5b57\u662f________; (2)\u8fd1\u4f3c\u65703\u4e07\u7cbe\u786e\u5230______\u4f4d,\u6709\u6548\u6570\u5b57\u662f________; (3)\u8fd1\u4f3c\u65705200\u5343\u7cbe\u786e\u5230________,\u6709\u6548\u6570\u5b57\u662f_________; (4)\u8fd1\u4f3c\u65700.20\u7cbe\u786e\u5230_________\u4f4d,\u6709\u6548\u6570\u5b57\u662f_____________. (2)\u8bbee=2.71828......,\u53d6\u8fd1\u4f3c\u65702.7\u662f\u7cbe\u786e\u5230__________\u4f4d,\u6709_______\u4e2a\u6709\u6548\u6570\u5b57;
\u53d6\u8fd1\u4f3c\u65702.7183\u662f\u7cbe\u786e\u5230_________\u4f4d,\u6709_______\u4e2a\u6709\u6548\u6570\u5b57. (3)\u7531\u56db\u820d\u4e94\u5165\u5f97\u5230\u03c0=3.1416,\u7cbe\u786e\u52300.001\u7684\u8fd1\u4f3c\u503c\u662f\u03c0=__________; (4)3.1416\u4fdd\u7559\u4e09\u4e2a\u6709\u6548\u6570\u5b57\u7684\u8fd1\u4f3c\u503c\u662f_____________;
(\u4e09)\u5224\u65ad\u9898:
(1)\u8fd1\u4f3c\u657025.0\u7cbe\u786e\u4ee5\u4e2a\u75ca,\u6709\u6548\u6570\u5b57\u662f2,5; (2)\u8fd1\u4f3c\u65704\u5343\u548c\u8fd1\u4f3c\u65704000\u7684\u7cbe\u786e\u7a0b\u5ea6\u4e00\u6837; (3)\u8fd1\u4f3c\u65704\u5343\u548c\u8fd1\u4f3c\u65704*10^3\u7684\u7cbe\u786e\u7a0b\u5ea6\u4e00\u6837; (4)9.949\u7cbe\u786e\u52300.01\u7684\u8fd1\u4f3c\u6570\u662f9.95.
\u7ec3\u4e60\u516b(B\u7ea7)
(\u4e00)\u7528\u56db\u820d\u4e94\u5165\u6cd5\u5bf9\u4e0b\u5217\u5404\u6570\u53d6\u8fd1\u4f3c\u503c(\u8981\u6c42\u4fdd\u7559\u4e09\u4e2a\u6709\u6548\u6570\u5b57): (1)37.27 (2)810.9 (3)0.0045078 (4)3.079
(\u4e8c)\u7528\u56db\u820d\u4e94\u5165\u6cd5\u5bf9\u4e0b\u5217\u5404\u6570\u53d6\u8fd1\u4f3c\u503c(\u8981\u6c42\u7cbe\u786e\u5230\u5343\u4f4d): (1)37890.6 (2)213612.4 (3)1906.57
9.
9x^2(x-1)^2-3(x^2-x)-56
=9x^2(x-1)^2-3x(x-1)-56
=[3x(x-1)-8][3x(x-1)+7]
=(3x^2-3x-8)(3x^2-3x+7
2 \u00d7 4 = ( )
8 - 1 = ( )
10 + 54 = ( )
64 - 5 = ( )
2 + 64 = ( )
1 \u00d7 8 = ( )
22 - 7 = ( )
39 - 23 = ( )
82 - 78 = ( )
3 \u00d7 5 = ( )
47 + 25 = ( )
57 + 43 = ( )
8 \u00d7 1 = ( )
5 + 28 = ( )
5 + 43 = ( )
62 - 60 = ( )
2 \u00d7 8 = ( )
2 + 35 = ( )
68 - 15 = ( )
2 \u00d7 8 = ( )
1 \u00d7 7 = ( )
17 + 7 = ( )
3 \u00d7 9 = ( )
49 - 18 = ( )
85 - 1 = ( )
39 + 44 = ( )
20 - 6 = ( )
37 - 9 = ( )
5 \u00d7 5 = ( )
64 - 22 = ( )
10 + 33 = ( )
70 - 7 = ( )
43 + 6 = ( )
3 \u00d7 6 = ( )
99 - 42 = ( )
9 - 1 = ( )
1 \u00d7 3 = ( )
5 + 93 = ( )
38 + 41 = ( )
48 - 21 = ( )
97 - 14 = ( )
64 - 17 = ( )
7 \u00d7 8 = ( )
2 \u00d7 9 = ( )
24 + 61 = ( )
9 \u00d7 2 = ( )
5 \u00d7 4 = ( )
35 + 37 = ( )
1 \u00d7 3 = ( )
1 \u00d7 9 = ( )
43 + 1 = ( )
1 \u00d7 7 = ( )
1 \u00d7 9 = ( )
28 + 20 = ( )
3 \u00d7 8 = ( )
37 + 3 = ( )
19 + 81 = ( )
46 + 13 = ( )
13 + 40 = ( )
43 + 35 = ( )
68 + 25 = ( )
7 \u00d7 4 = ( )
8 \u00d7 7 = ( )
9 \u00d7 8 = ( )
1 \u00d7 6 = ( )
3 \u00d7 4 = ( )
40 + 14 = ( )
93 - 31 = ( )
60 + 8 = ( )
12 + 29 = ( )
45 + 38 = ( )
97 - 5 = ( )
5 \u00d7 3 = ( )
6 \u00d7 5 = ( )
69 - 67 = ( )
7 \u00d7 8 = ( )
89 - 60 = ( )
91 - 28 = ( )
95 - 44 = ( )
5 \u00d7 2 = ( )
2 \u00d7 8 = ( )
30 + 15 = ( )
5 \u00d7 2 = ( )
18 + 43 = ( )
10 + 90 = ( )
98 - 58 = ( )
65 + 35 = ( )
7 \u00d7 1 = ( )
78 - 34 = ( )
87 - 23 = ( )
25 + 55 = ( )
42 - 31 = ( )
51 + 5 = ( )
83 + 7 = ( )
2 \u00d7 5 = ( )
75 - 73 = ( )
10 + 72 = ( )
29 + 57 = ( )
75 - 33 = ( )
8 \u00d7 4 = ( )
[-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=
1.125+[-17/5]+[-1/8]+[-0.6]=
0.75+[-11/4]+0.125+12又5/7+[-3/8]=
[-4/9]+[-3/5]+[+11/8]+[+5/9]+[-1/8]+[-0.4]= 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=
1.125+[-17/5]+[-1/8]+[-0.6]=
0.75+[-11/4]+0.125+12又5/7+[-3/8]=
[-4/9]+[-3/5]+[+11/8]+[+5/9]+[-1/8]+[-0.4]=
1+1=2
2-8=-6
8+6=14
9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999+1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111=10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
绛旓細闂鏈夐棶棰樺晩锛鏈夌悊鏁閭ｈ寖鍥村彲灏卞ぇ浜嗭紝鍒嗘暟鍜岃嚜鐒舵暟閮芥槸鏈夌悊鏁般備綘瑕80涓紝閭ｆ垜灏卞啓80涓惂 1+1=2锛堣繖涓涓嶄細锛屼笅杈圭殑鎴戝姖鍚勪釜浣犲氨鍒湅浜嗭紝鍛靛懙--缂撳拰姘旀皼锛1+2=3锛1+3=4锛1+4=5锛1+5=6锛1+6=7锛1+7=8锛1+8=9锛1+9=10銆11+10=21锛11+12=23锛11+11=22锛11+13=24锛...
绛旓細鍒濅竴鏈夌悊鏁板彛绠楅, 姹傚垵涓涓婃湁鐞嗘暟鍙ｇ畻棰200閬 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= 1.125+[-17/5]+[-...
绛旓細(-2)-7 鍔犱竴涓暟绛変簬鍔犱笂杩欎釜鏁扮殑鐩稿弽鏁 鍘熷紡=锛-2锛+锛-7锛=-9 浠ユ绫绘帹锛堢被浼艰繖鏍风殑棰橀兘鍙互杩欐牱鍋氾級浠涔鍙ｇ畻鍢浡蜂綘涔熻鍑轰竴閬撻鍟
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绛旓細100 5. 涓嶈兘 璇存槑锛3鍙澂鍙ｆ湞涓婁负鏁板3锛岀炕杞竴鍙浉褰撲簬鏁板肩敱1鍙樹负-1锛屽嵆涓-2锛屽垯涓娆＄炕杞2鍙负-4锛屾寰楀埌3鍙澂鍙ｆ湞涓嬶紝鍗-3锛屽彲鍒楀紡 3-4x=-3 x涓嶄负鏁存暟锛屽嵆涓嶈兘锛涘悓鐞嗭紝7鍙澂鍙ｆ湞涓婁负7锛屾瘡娆＄炕杞3鍙负-6锛屾寰楀埌-7 鍙垪寮 7-6x=-7 x涓嶄负鏁存暟锛屽嵆涓嶈兘銆
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