人教版初二数学上册整数指数幂练习题精选5Word文档下载推荐.docx
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人教版初二数学上册整数指数幂练习题精选5Word文档下载推荐.docx
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二、用科学记数法表示下列各数。
0.0000060.0690.009440.0189
0.0000070.0000840.07530.000267
a-5×
a5(a-4b2)2a-1b2•(a2b-3)0
7909-1y-1
x2y-1(x-2y)2(3ab2c)-2÷
(a-2b)2
(3×
10-2)×
(4.7×
109)(3×
10-3)2÷
(10-5)3
0.00020.0000080.07030.00245
0.00050.0950.002960.00911
a-1÷
a5(a-2b2)2a-2b3•(a3b-2)-1
8101-1x0
x2y-3(x-3y)3(4a2bc-1)-2÷
(a-2b2)3
10-9)×
(4.2×
108)(8×
10-6)2÷
(10-6)2
0.00050.0000150.0008830.025
0.0000050.000320.00460.0312
a-4÷
a3(a-2b3)3a-2b2•(a2b-2)-1
6904-2m0
x2y-2(x-3y)2(2a3bc-2)-3÷
(a-3b3)3
(2×
10-6)×
(4.6×
(10-3)3
0.0000020.00980.004160.00327
0.0000010.000570.005510.000167
a-2÷
a4(a-3b2)3a-3b3•(a2b-3)-1
8404-2a0
x2y-3(x-1y2)3(4ab2c)-3÷
(5×
(1.7×
105)(2×
0.000030.0000930.0004060.0876
0.0000030.0270.0002020.0111
a-4×
a3(a-2b2)2a-1b2•(a3b-3)-1
8509-1x-2
x3y-2(x-2y)3(4a3bc)-3÷
(a-3b)3
(9.3×
0.000090.0620.006530.00134
0.000010.00390.002870.00059
a-5÷
a4(a-2b3)3a-2b3•(a2b-3)0
206-1y-3
x2y-1(x-2y)3(2a3b2c)-1÷
(1.2×
104)(4×
10-1)3÷
(10-2)3
0.000070.00260.007940.00526
0.000030.0560.04490.00947
a4(a-2b2)2a-2b2•(a3b-2)-1
9109-1y0
x3y-3(x-1y2)3(4a2bc)-2÷
(a-1b2)3
(9×
(7.7×
103)(9×
10-4)2÷
(10-6)3
0.0000040.0000410.007190.00685
0.0000020.00520.004050.0112
a2(a-1b3)2a-1b2•(a2b-1)-2
5404-2a-3
x3y-3(x-1y2)2(2abc)-2÷
(a-2b3)3
(1×
(7.3×
107)(3×
(10-2)2
0.0000040.000580.0008170.000316
0.00020.0000670.009710.0192
a5(a-4b2)2a-3b2•(a2b-1)0
2302-1m-1
x3y-1(x-2y3)3(3a3b3c)-1÷
(8×
(4.5×
(10-1)4
0.0000040.0000970.0008950.000016
0.0000030.0000980.001390.0189
a2(a-4b2)2a-3b3•(a3b-2)0
4607-2b-2
x3y-1(x-1y)3(3ab2c)-3÷
(a-1b)2
(6×
(5.3×
104)(6×
10-6)3÷
(10-4)2
0.0000010.00460.0007780.0089
0.00070.000310.0007010.0826
a-3÷
a5(a-4b2)3a-3b3•(a3b-2)-1
3306-2x-1
x3y-1(x-1y)3(4abc)-2÷
(a-3b2)3
(3.3×
107)(7×
10-2)2÷
(10-6)4
0.00030.0910.000940.0596
0.0000050.00990.000540.0488
a4(a-2b2)2a-3b2•(a3b-2)-3
6406-1b-1
x3y-2(x-2y)2(3abc)-3÷
(a-2b)3
(9.8×
103)(5×
10-5)3÷
0.00010.000880.004450.00574
0.000090.0510.05830.000824
a4(a-1b3)3a-2b2•(a3b-1)-1
2007-1y-1
x2y-2(x-2y2)3(2a2b2c)-2÷
10-5)×
(8.6×
102)(4×
10-4)3÷
0.0000030.000940.001410.000342
0.0000060.000940.001010.00094
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