用简便方法计算3.78x9.9
答案:5 悬赏:10 手机版
解决时间 2021-02-15 15:27
- 提问者网友:雾里闻花香
- 2021-02-14 17:42
用简便方法计算3.78x9.9
最佳答案
- 五星知识达人网友:举杯邀酒敬孤独
- 2021-02-14 19:20
用简便方法计算
3.78x9.9
=3.78×(10-0.1)
=3.78×10-3.78×0.1
=37.8-0.378
=37.422
3.78x9.9
=3.78×(10-0.1)
=3.78×10-3.78×0.1
=37.8-0.378
=37.422
全部回答
- 1楼网友:舊物识亽
- 2021-02-14 22:27
3.78*9.9
=3.78*9.9+3.78*0.1-3.78*0.1
=3.78*(9.9+0.1)-3.78*0.1
=3:78*10-3.78*0.1
=37.8-0.378
=37.422
=3.78*9.9+3.78*0.1-3.78*0.1
=3.78*(9.9+0.1)-3.78*0.1
=3:78*10-3.78*0.1
=37.8-0.378
=37.422
- 2楼网友:拾荒鲤
- 2021-02-14 22:09
3.78x9.9=3.78×(10-0.1)=37.8-0.378=37.422
- 3楼网友:千杯敬自由
- 2021-02-14 21:16
3.78x10-3.78x0.1
=37.8-0.378
=37.422
=37.8-0.378
=37.422
- 4楼网友:山河有幸埋战骨
- 2021-02-14 20:10
3.78×99
=3.78×(100-1)
=3.78×100-3.78×1
=378-3.78
=374.22
=3.78×(100-1)
=3.78×100-3.78×1
=378-3.78
=374.22
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