简便运算要过程:14×(1+20%)=?12%×17.5-12%×7.5=?
问题描述:
简便运算要过程:14×(1+20%)=?12%×17.5-12%×7.5=?
答
14×(1+20%)
=14x1+14x20%
=14+2.8
=16.8
12%×17.5-12%×7.5
=12%x(17.5-7.5)
=12%x10
=1.2