2⼀5-0.75x2⼀5有简便算法吗?

2025-04-07 02:13:09
推荐回答(2个)
回答1:

2/5-0.75x2/5
=2/5×(1-0.75) //1是第一个2/5看成2/5×1
=2/5×0.25
=0.4×0.25

=0.1

回答2:

2/5-0.75×25
=2/5×(1-0.75)
=0.4×0.25
=0.1