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7.5×0.48+4.8×0.25怎么简便计算
人气:167 ℃ 时间:2019-12-13 03:40:46
解答
7.5×0.48+4.8×0.25
=7.5×0.48+0.48×2.5
=0.48x(7.5+2.5)
=0.48x10
=4.8
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