2又2分之1乘19又9分之7乘1.25乘0.32 等于多少?
问题描述：
2又2分之1乘19又9分之7乘1.25乘0.32 等于多少?
答
(2+1/2)*(19+7/9)*1.25*0.32
=5/2*178/9*5/4*8/25
=5*178/9*5*1/25
=178/9
答
2又1/2×19又7/9×1.25×0.32
=2.5*19又7/9*1.25*0.8*0.4
=（2.5*0.4）*（1.25*0.8）*19又7/9
=1*1*19又7/9
=19又7/9