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趣味数学之折扣问题⑪：用2种方法计算2次购物能省多少钱，重理解
本节的内容主要讲述的是小学趣味数学（多为思维训练的题目），可以尝试让孩子做一做，很有挑战意义；本节涉及的是折扣问题⑪：2种方法计算，能省多少钱
小学趣味数学：奥数精炼，让孩子打开思维，爱上数学学习190/373
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