2.5+7.5*(3.64-1.24)怎么简算
问题描述:
2.5+7.5*(3.64-1.24)怎么简算
答
2.5+7.5*(3.64-1.24)
=2.5+7.5*2.4
=2.5+7.5*2*1.2
=2.5+15*1.2
=2.5+15*2*0.6
=2.5+30*0.6
=2.5+18
=20.5