简便计算:28\58×14\5+38\5×7.2

问题描述:

简便计算:28\58×14\5+38\5×7.2

28\58×14\5+28\5×7.2
=2/28*(29+2+5*3.6)
=1/14*(29+2+18)
=1/14*49

28\58×14\5+28\5×7.2
=2/28*(29+2+5*3.6)
=1/14*(29+2+18)
=1/14*49
=7/2