Question

求大神简便运算

12.5x0.38-2.5x0.38简便算法

Answer 1

12.5x0.38-2.5x0.38
=（12.5-2.5）x0.38
=10x0.38
=3.8

Answer 2

12.5×0.38-2.5×0.38
= 10×0.38
= 3.8

Answer 3

=0.38*(12.5-2.5)
=0.38*10
=3.8