(2.5-0.25)×0.4简便方法

2025-05-07 22:11:58
推荐回答(3个)
回答1:

乘法交换律 2.5*0.4-0.25*0.4=0.9

回答2:

=2.5✘0.4-0.25✘0.4
=1-0.1
=0.9

回答3:

2.5*0.4-0.25*0.4