2.5*3.6+3.6*7.5用简便计算
问题描述:
2.5*3.6+3.6*7.5用简便计算
答
2.5×3.6+3.6×7.5
=3.6×(2.5+7.5)
=3.6×10
=36
答
=3.6x(1.5+7.5)=3.6x10=36.