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3.15÷4-2.15×0.25的简算
人气:104 ℃ 时间:2020-05-25 23:11:31
解答
3.15÷4-2.15×0.25
=3.15*0.25-2.15*0.25
=0.25*(3.15-2.15)
=0.25*1
=0.25
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