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3.9乘以0.309除以0.26怎么简算?
人气:114 ℃ 时间:2019-12-24 12:13:31
解答
3.9*.0309/.026=(1/100)*39*309/26=(1/100)*13*3*309/(13*2)=(1/100)*3*309/2
=(1/100)*927/2=(1/100)*463.5=4.635
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