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1.3 有理数的加减法,1.3.1 有理数的加法,学前温故,新课早知,学前温故,新课早知,学前温故,新课早知,学前温故,新课早知,解,一,二,解,分析,一,二,解,分析,1,2,3,4,5,6,7,8,答案,1,2,3,4,5,6,7,8,答案,1,2,3,4,5,6,7,8,答案,1,2,3,4,5,6,7,8,答案,1,2,3,4,5,6,7,8,答案,1,2,3,4,6,7,5,8,答案,1,2,3,4,6,7,5,8,答案,1,2,3,4,6,7,5,8,解,