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4.42*0.75+6.63*1.5简算
人气:156 ℃ 时间:2020-02-04 13:30:47
解答
4.42*0.75+6.63*1.5
=2.21×1.5+6.63×1.5
=2.21×1.5×(1+3)
=2.21×1.5×4
=2.21×6=13.26
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