24✖️0.25✖️1.25用简便方法怎么算？

Answer 1

   24✖️0.25✖️1.25

=3×8×0.25×1.25..............拆数

=（3×0.25）×（8×1.25）........乘法的交换、结合律

=0.75×10

=7.5

Answer 2

24✖️0.25✖️1.25
=(8X3)✖️0.25✖️1.25
=(8X1.25)X(3X0.25)
=10X0.75
=7.5