数学题:小兔晴天可以采12个蘑菇

  • 时间:2020-05-11 16:38:51
  • 分类:数学世界
  • 阅读:150 次

数学题:小兔晴天可以采12个蘑菇,雨天和阴天只可以采8个蘑菇。四月小兔共采了340个蘑菇,这个月中有多少个晴天?多少个雨天和阴天?(由李亚涵提问)

数学题解答:看到这道题我感觉似曾相识……

哦,对了,以前见过小松鼠采松果的题目,晴天采几个,雨天采几个,求几个晴天,几个雨天的题目。跟这题差不多,其实它们本质上都是“鸡兔同笼”问题。

还是用假设法解决吧!四月属于小月,是30天,假设全是晴天,那么一共可以采:12×30=360(个)。

实际采了340个,少采了:360-340=20(个)

雨天阴天和晴天相比,一天少采:12-8=4(个)

少采20个蘑菇要几个雨天和阴天:20÷4=5(个)

晴天的天数:30-5=25(天)

答:这个月中有25个晴天。5个雨天和阴天。

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