7.4*0.28+7.2*0.74怎么简算
问题描述:
7.4*0.28+7.2*0.74怎么简算
答
=0.74*2.8+7.2*0.74=0.74*(2.8+7.2)=0.74*10=7.4
答
7.4*0.28+7.2*0.74
=0.74x2.8+0.74x7.2
=0.74x(2.8+7.2)
=0.74x10
=7.4