二点五乘零点六减一点八乘零点五的简便运算方法。

Question

如题所述

Answer 1

2.5x0.6-1.8x0.5
=2.5x0.6-0.6x1.5
=（2.5-1.5）x0.6
=1x0.6
=0.6

Answer 2

原式等于2.5*0.6-0.6*3*0.5=2.5*0.6-0.6*1.5=0.6*（2.5-1.5）=0.6

Answer 3

答：2.5*0.6-1.8*0.5
=0.5*0.6*5-0.5*0.6*3
=0.5*0.6*（5-3）
=0.3*2
=0.6