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5.4乘0.72除以0.72除以5.4的简便方法
人气:374 ℃ 时间:2020-04-04 16:59:03
解答
5.4×0.72÷0.72÷5.4
=5.4×﹙0.72÷0.72﹚÷5.4
=5.4×1÷5.4
=5.4÷5.4
=1
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