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5/27÷4+22/27×0.25 简便计算
人气:407 ℃ 时间:2020-02-15 08:47:44
解答
5/27÷4+22/27×0.25
=5/27x1/4+22/27×1/4
=(5/27+22/27)x1/4
=1x1/4
=1/4
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