7/15+5/9-2/15。要过程。
答案:6 悬赏:50 手机版
解决时间 2021-03-17 04:17
- 提问者网友:做自己de王妃
- 2021-03-16 11:03
7/15+5/9-2/15。要过程。
最佳答案
- 五星知识达人网友:愁杀梦里人
- 2021-03-16 12:03
21/45+25/45-6/45=40/45=8/9
全部回答
- 1楼网友:轮獄道
- 2021-03-16 14:55
7/15+5/9-2/15
=21/45+25/45-6/45
=40/45
首先是通分,找出最小的公倍数然后进行计算就可以了,,,,,希望可以帮到你............
=21/45+25/45-6/45
=40/45
首先是通分,找出最小的公倍数然后进行计算就可以了,,,,,希望可以帮到你............
- 2楼网友:西岸风
- 2021-03-16 14:14
7/15+5/9-2/15
=21/45+25/45-6/45
=(21+25-6)/45
=40/45
=8/9追答7/15+5/9-2/15
=(7/15-2/15)+5/9
=5/15+5/9
=3/9+5/9
=8/9
=21/45+25/45-6/45
=(21+25-6)/45
=40/45
=8/9追答7/15+5/9-2/15
=(7/15-2/15)+5/9
=5/15+5/9
=3/9+5/9
=8/9
- 3楼网友:詩光轨車
- 2021-03-16 12:51
= (7/15 - 2/15) + 5/9
= 5/15 + 5/9
= 1/3 + 5/9
= 3/9 + 5/9
=8/9
= 5/15 + 5/9
= 1/3 + 5/9
= 3/9 + 5/9
=8/9
- 4楼网友:思契十里
- 2021-03-16 12:37
7/15-2/15+5/9
=5/15+5/9
=1/3+5/9
=3/9+5/9
=8/9
请采纳,你的采纳是我上进的动力!可以追问,一直到懂!!
=5/15+5/9
=1/3+5/9
=3/9+5/9
=8/9
请采纳,你的采纳是我上进的动力!可以追问,一直到懂!!
- 5楼网友:迷人又混蛋
- 2021-03-16 12:09
7/15+5/9-2/15
=7/15-2/15+5/9
=5/15+5/9
=1/3+5/9
=3/9+5/9
=8/9
=7/15-2/15+5/9
=5/15+5/9
=1/3+5/9
=3/9+5/9
=8/9
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