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速算巧算：不列竖式，要求巧算，分享两种方法，你能想到几种方法
128×24 小学数学，小学奥数，家长课堂，数学思维训练，巧算速算,简便运算方法，知识积累，教育孩子，思维训练 小学数学必考题，小学数学易错题，小学数学计算题，小学数学应用题 @圆心数学思维
小学数学-巧算+速算+简便计算116/485
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