奥数题:A+B=2300,小红计算时将A个位上的0漏掉了
- 时间:2020-06-09 15:27:22
- 分类:数学世界
- 阅读:143 次
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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