[2.25+0.75×(5/12×0.15)]×5/12
=[9/4+3/4(5/12×3/20)]×5/12
=3/4×(3+1/16)×5/12
=3/4×49/16×5/12
=(49×5)/(16×16)
=245/256
[2.25+0.75×(5/12×0.15)]×5/12简算
[2.25+0.75×(5/12×0.15)]×5/12简算
怎么算?
怎么算?
数学人气:861 ℃时间:2020-03-25 14:54:14
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