孙老师今年36岁,陈天任今年10岁
- 时间:2020-06-19 15:24:28
- 分类:数学世界
- 阅读:132 次
孙老师今年36岁,陈天任今年10岁,多少年后孙老师年龄是陈天任3倍?请用小学数学方法解答。
解答如下:36-10=26(岁),这是孙老师比陈天任大的岁数,也是N年之后孙老师比陈天任大的岁数。当孙老师年龄是陈天任的3倍时,他比陈天任的岁数多:3-1=2(倍),陈天任岁数的2倍是26岁,那么一倍就是26÷2=13(岁),所以那时陈天任13岁,孙老师是13×3=39(岁),这是几年之后的事情呢?
13-10=3(年)或39-36=3(年),答:3年之后陈老师的岁数是陈天任的3倍。
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