数学题:小明家住7楼
- 时间:2020-05-02 12:13:06
- 分类:数学世界
- 阅读:108 次
数学题:小明家住7楼,他从一楼走到三楼用了三分之二分钟,再从3楼走到7楼要用多少时间?(提问:芷静-资优网)
数学题解答:
从一楼到三楼要上两层楼,先算出上一层楼的时间;从三楼到七楼需要上四层楼,再算出时间。
2/3 ÷ (3-1) × (7-3)=4/3(分钟)
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