摘要:1.试一试:
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1、试一试:
(1) 1000=10(
(2)3710=3.71×1000=3.71×10(
(3)-250100000=-2.501×10(
(4)0.01=10(
(5)0.001=10(
(6)0.00001=10(
(7)0.034=3.4×10(
(8)0.0072=7.2×0.001=7.2×10(
(9) 0.000000548=5.48×0.0000001=5.48×10(
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(1) 1000=10(
3
)(2)3710=3.71×1000=3.71×10(
3
)(3)-250100000=-2.501×10(
8?
)(4)0.01=10(
-2
)(5)0.001=10(
-3
)(6)0.00001=10(
-5
)(7)0.034=3.4×10(
-2
)(8)0.0072=7.2×0.001=7.2×10(
-3
)(9) 0.000000548=5.48×0.0000001=5.48×10(
-7
)