(2.5-0.25)×0.4简便计算?

2024-12-02 03:56:21
推荐回答(2个)
回答1:

=2.5x0.4-0.25x0.4
=1-0.1=0.9

回答2:

2.5×0.4-0.25×0.4=0.9