数学题:庆六一，四一班买了30只红气球和黄气球装点教室。红气球吹爆了两只，还比黄气球的两倍多四只。四一班原来红气球、黄气球各买了多少只？(求解题思路和算式）

数学题解答：

30-2-4=24（只）…………从总数中去掉吹爆的和多的4只

把黄气球个数看成1份，则去掉吹爆的和多的之后的红气球是2份，两种颜色一共是3份。

24÷(1+2)=8（只）………………这是黄气球

30-8=22（只）…………这是原来的红气球

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