用简便方法计算2⼀5+2⼀3-2⼀5。

2025-02-25 23:25:07
推荐回答(3个)
回答1:

2/5+2/3-2/5
=(2/5-2/5)+2/3
=0+2/3
=2/3

回答2:

=2/5-2/5+2/3
=(2-2)/5+2/3
=0+2/3
=2/3

回答3:

2/5+2/3-2/5
=2/5-2/5+2/3
=0+2/3
=2/3