18.9-18.9 1.4的简便算法(18.9-18.9÷1.4的简便方法)

18.9-18.9 1.4的简便算法(18.9-18.9÷1.4的简便方法)

首页维修大全综合更新时间:2024-07-03 20:15:03

18.9-18.9 1.4的简便算法

18.9-18.9/1.4

=18.9-18.9*(1/1.4)

=18.9-18.9*5/7

=18.9*(1-5/7)

=18.9*2/7

=5.4

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