还有10块钱哪儿去了

  • 时间:2020-05-01 11:23:54
  • 分类:数学世界
  • 阅读:116 次

还有10块钱哪儿去了?向爸爸借了500元, 向妈妈借了500元, 买了双皮鞋用了970元。 剩下30元, 还爸爸10块, 还妈妈10块, 自己剩下了10块, 欠爸爸490元, 欠妈妈490元, 490+490=980(元)。 加上自己的10块=990(元)。 还有10块去哪里了呢?

数学题解答:490+490=970+10

借爸爸500元,还了10元,实际借了490元。

借妈妈500元,还了10元,实际也借了490元。

一共借了490+490=980(元)

自己买的皮鞋970元,手中还有10元,合起来正好是980元。

题中把980元加上10元,是没有道理的。

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