数学题:外婆家养了好多鸡，这些鸡都下蛋了呢！瞧，小明和外婆正往篮子里捡鸡蛋，前6分钟，每2秒钟放进一个鸡蛋，后6分钟，每3秒钟放进4个鸡蛋，12分钟后，篮子装满了。你知道篮子里最后有多少个鸡蛋吗？

数学题解答:先分别算出前6分钟捡的鸡蛋和后6分钟捡的鸡蛋，最后加起来。

6×60÷2×1＋6×60÷3×4＝180+480=660（个）

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