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9.9×1.01的简便运算
人气:312 ℃ 时间:2020-04-16 16:01:39
解答
9.9×1.01
=(10-0.1)×(10-0.1)×0.1
=(10×10-0.1×0.1)×0.1
=(100-0.01)×0.1
=9.999
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