【1】5/7除以8/9+7/8除以7/5-5/7 【2 】8.5*75％+15/2除以4/3
答案:3 悬赏:20 手机版
解决时间 2021-03-20 14:26
- 提问者网友：遁入空寂
- 2021-03-19 20:41
【1】5/7除以8/9+7/8除以7/5-5/7 【2 】8.5*75％+15/2除以4/3
最佳答案
- 五星知识达人网友：污到你湿
- 2021-03-19 22:12
【1】5/7除以8/9+7/8除以7/5-5/7
=5/7×9/8+7/8×5/7-5/7
=5/7×（9/8+7/8-1）
=5/7
【2 】8.5*75％+15/2除以4/3
=8.5×3/4+7.5×3/4
=（8.5+7.5）×3/4
=16×3/4
=12
=5/7×9/8+7/8×5/7-5/7
=5/7×（9/8+7/8-1）
=5/7
【2 】8.5*75％+15/2除以4/3
=8.5×3/4+7.5×3/4
=（8.5+7.5）×3/4
=16×3/4
=12
全部回答
- 1楼网友：詩光轨車
- 2021-03-19 23:37
(1) 5/7÷8/9+7/8÷7/5-5/7
=5/7x9/8+7/8x5/7-5/7x1
=5/7x(9/8+7/8-1)
=5/7
=5/7x9/8+7/8x5/7-5/7x1
=5/7x(9/8+7/8-1)
=5/7
- 2楼网友：等灯
- 2021-03-19 23:07
5/7/8/9+7/8/7/5-5/7
=5/7*9/8+7/8*5/7-5/7x1
=5/7x(9/8+7/8-1)
=5/7
17/2*3/4+15/2*3/4
=(17/2+15/2)*(3/4)
=16*3/4
=12
=5/7*9/8+7/8*5/7-5/7x1
=5/7x(9/8+7/8-1)
=5/7
17/2*3/4+15/2*3/4
=(17/2+15/2)*(3/4)
=16*3/4
=12
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