简便计算:48x27/49,9×(1/9+1/7)x7,7/8+7/8x99,5/9x1/8X27
答案:2 悬赏:80 手机版
解决时间 2021-01-26 14:19
- 提问者网友:我一贱你就笑
- 2021-01-25 16:08
简便计算:48x27/49,9×(1/9+1/7)x7,7/8+7/8x99,5/9x1/8X27
最佳答案
- 五星知识达人网友:迷人又混蛋
- 2021-01-25 17:11
追答亲,满意吗,别忘了好评哦!
全部回答
- 1楼网友:孤独入客枕
- 2021-01-25 18:46
48x27/49
=(49-1)×27/49
=49×27/49-27/49
=27-27/49
=26又22/49
9×(1/9+1/7)x7
=9×1/9×7+9×1/7×7
=7+9
=16
7/8+7/8x99
=7/8×(1+99)
=7/8×100
=7/2 ×25
=175/2
5/9x1/8X27
=5/9×27 ×1/8
=15×1/8
=15/8
=(49-1)×27/49
=49×27/49-27/49
=27-27/49
=26又22/49
9×(1/9+1/7)x7
=9×1/9×7+9×1/7×7
=7+9
=16
7/8+7/8x99
=7/8×(1+99)
=7/8×100
=7/2 ×25
=175/2
5/9x1/8X27
=5/9×27 ×1/8
=15×1/8
=15/8
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