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小学数学：分数的加减法：带分数相加减
小学数学：分数的加减法：带分数相加减 42/3 + 13/16 - 22/16 =4 + 2/3 + 13/16 - (2 + 2/16) =4 + 2/3 + 13/16 - 2 - 2/16 =4 - 2 + 2/3 + 13/16 - 2/16 =2 + 2/3 + 11/16 =2 + (32+33)/48 =2 + 65/48 =2 + 117/48 =317/48
小升初数学总复习189/299
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