数学题:妈妈买苹果和梨各用去多少钱?
- 时间:2020-05-09 14:38:58
- 分类:数学世界
- 阅读:138 次
数学题:苹果和梨的单价比是6:5,妈妈买的苹果和梨的重量比是2:3,共用去18元,妈妈买苹果和梨各用去多少钱?(提问的同学:破灭-资优网)
数学题解答:此题可用按比例分配来解,不过首先需要求出苹果和梨总价的比。
依据就是数量关系式:单价×数量=总价
苹果和梨总价的比是:(6×2):(5×3)=12:15=4:5
苹果的总价:18÷(4+5)×4=8(元)
梨的总价:18÷(4+5)×5=10(元)
答:妈妈分别买了8元的苹果和10元的梨。
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