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0.63乘20.1简便方法
人气:112 ℃ 时间:2020-06-26 00:16:55
解答
0.63x20.1
=(0.5 + 0.13)(20+0.1)
=0.5x20+0.5x0.1+0.13x20+0.13x0.1
=1+0.05+2.6+0.013
=12.663
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