3⼀8-7⼀15x3⼀8可用到简便方法

2024-12-29 06:02:54
推荐回答(3个)
回答1:

3/8-7/15x3/8
=1x3/8-7/15x3/8
=(1-7/15)x3/8
=8/15x3/8
=1/5

回答2:

提取相同的因数

3/8-7/15x3/8
=1x3/8-7/15x3/8
=(1-7/15)x3/8
=8/15x3/8
=1/5

回答3:

8/9 10/11-(3/11 2/9) = 8/9-2/9 10/11-3/11 =2/3 7/11 =43/33 9/26 5/14-3/13 3/28 =9/26-3/13 5/14 3/28 =3/26