2⼀5×25%+1⼀4×4⼀5简便计算

2024-11-30 22:06:01
推荐回答(2个)
回答1:

回答2:

2/5×25%+1/4×4/5
=2/5×1/4+1/4×4/5
=(2/5+4/5)×1/4
=6/5×1/4
=3/10