(5/4-7/6)x(-8/7)怎么做 求大家帮帮忙
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解决时间 2021-02-11 21:35
- 提问者网友：十年饮冰
- 2021-02-11 02:04
(5/4-7/6)x(-8/7)怎么做 求大家帮帮忙
最佳答案
- 五星知识达人网友：猎心人
- 2021-02-11 03:08
(5/4-7/6)x(-8/7)
=5/4 x (-8/7) +7/6 x8/7
=5/1x(-2/7) +6 x8/1
= -10/7 +4/3
=-20/14+20/15
=20/1
=5/4 x (-8/7) +7/6 x8/7
=5/1x(-2/7) +6 x8/1
= -10/7 +4/3
=-20/14+20/15
=20/1
全部回答
- 1楼网友：走死在岁月里
- 2021-02-11 05:11
(5/4-7/6)x(-8/7)
=(15/12-14/12)x(-8/7)
=1/12x(-8/7)
=-2/21
=(15/12-14/12)x(-8/7)
=1/12x(-8/7)
=-2/21
- 2楼网友：一叶十三刺
- 2021-02-11 04:47
(5/4-7/6)x(-8/7)
=(30/24 - 42/24)x(-8/7)
=-12/24 x -8/7
=- 4/ 7
=(30/24 - 42/24)x(-8/7)
=-12/24 x -8/7
=- 4/ 7
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