69×99怎么简便
答案:6 悬赏:80 手机版
解决时间 2021-04-05 17:16
- 提问者网友:别再叽里呱啦
- 2021-04-05 00:44
69×99怎么简便
最佳答案
- 五星知识达人网友:夜余生
- 2021-04-05 01:38
解:采用拆分法和分配律,
原式=69x99
=69x(100-1)
=69x100-69
=6900-69
=6831
原式=69x99
=69x(100-1)
=69x100-69
=6900-69
=6831
全部回答
- 1楼网友:轻熟杀无赦
- 2021-04-05 05:45
69×(100-1)=6900-69=6831
- 2楼网友:woshuo
- 2021-04-05 04:48
69×99
=69×(100-1)
=69×100-69
=6900-69
=6831
=69×(100-1)
=69×100-69
=6900-69
=6831
- 3楼网友:胯下狙击手
- 2021-04-05 04:27
69x99
=69x(100-1)
=69x100-69x1
=6900-69
=6831
=69x(100-1)
=69x100-69x1
=6900-69
=6831
- 4楼网友:归鹤鸣
- 2021-04-05 03:28
69×99
=69×(100-1)
=69×100-69×1
=6900-69
=6831
就是这样简单
=69×(100-1)
=69×100-69×1
=6900-69
=6831
就是这样简单
- 5楼网友:思契十里
- 2021-04-05 03:09
两种方法
69×99
=(70-1)×99
=70×99-99
=6930-99
=6900-69
=6840-9
=6831
69×99
=69×(100-1)
=6900-69
=6840-9
=6831
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