11*8.75+125*0.19怎样简便计算
问题描述:
11*8.75+125*0.19怎样简便计算
要飞快,慢了不要.
答
11*8.75+125*0.19
=11*1.25*7+1.25*19
=77*1.25+1.25*19
=1.25*(77+19)
=1.25*96
=1.25*8*12
=120