2012年 AMC 10A真题含答案 201212012AMC 10A Problem 1 Cagney can frost a cupcake every seconds and Lacey can frost a cupcake every seconds.Working together,how many cupcakes can they frost in minutes?Cagney 每20秒可以给一个蛋糕上霜，Lacey 每30秒可以给一个蛋糕上霜，他俩合作5分钟内可以给多少个...
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2012AMC10A真题与答案解析