I think it is very different!小明向爸爸借了500元,向妈妈借了500元,买了一双鞋花了970元,还剩30元,还给爸爸了10元,还给妈妈了10元,自己留了10元,还该妈妈的490元,该爸爸的490元,490+490+10=990(元),那么

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I think it is very different!小明向爸爸借了500元,向妈妈借了500元,买了一双鞋花了970元,还剩30元,还给爸爸了10元,还给妈妈了10元,自己留了10元,还该妈妈的490元,该爸爸的490元,490+490+10=990(元),那么

I think it is very different!小明向爸爸借了500元,向妈妈借了500元,买了一双鞋花了970元,还剩30元,还给爸爸了10元,还给妈妈了10元,自己留了10元,还该妈妈的490元,该爸爸的490元,490+490+10=990(元),那么
I think it is very different!
小明向爸爸借了500元,向妈妈借了500元,买了一双鞋花了970元,还剩30元,还给爸爸了10元,还给妈妈了10元,自己留了10元,还该妈妈的490元,该爸爸的490元,490+490+10=990(元),那么那10元钱上哪里去啦?

I think it is very different!小明向爸爸借了500元,向妈妈借了500元,买了一双鞋花了970元,还剩30元,还给爸爸了10元,还给妈妈了10元,自己留了10元,还该妈妈的490元,该爸爸的490元,490+490+10=990(元),那么
典型的偷换概念.
最后误导大家的是一个加法:980+10≠1000.
其实等小红给爸妈各10元后,就不存在1000这个数了,而是980.
这980有970在卖鞋的那里,10在小红手里
so,就是这么简单.
还可以这样
其实最后的问题有误,490+490+10=990没错,但这990是只是最终欠父母的980块钱加上自己口袋里的10块钱相加而已,也就是说980是欠父母的,10元是自己的;所以这990和第一次借1000元根本不是一回事,所以根本不存在什么少了10元这样的问题!
换种思维:也就是说当偿还父母各10元钱后,最初问父母借的1000块钱的债务关系已消除,而变成了最终实际欠父母980块钱.也就是这980和最初1000元没有任何关系,不存在980+10等于990和1000元比较差10元的问题,因为口袋里10元钱是自己的,假如口袋里有一万块钱,加起来一万零980和最初借的那1000元钱怎么可能有关系呢?对不对?明白没?

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