3.5x1.02的简便计算？

Question

如题所述

Answer 1

3.5x1.02
=3.5x(1+0.02)
=3.5+0.07
=3.57

Answer 2

拆解法最简便，3.5*（1+0.02）=3.5*1+3.5*0.02=3.5+0.07=3.57。