数学题：A+B=2300，小红计算时将A个位上的0漏掉了，结果算出的和是1220，求A、B分别多少。

数学题解答：“小红计算时将A个位上的0漏掉了”说明A变成原来的1/10，现在的数与原来的数相差9倍。

前后相差：2300-1220=1080

现在的Ａ：1080÷（１０－１）＝１２０

原来的Ａ：１２０×１０＝１２００

Ｂ是多少：２３００－１２００＝１１００

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