Entry Nº 057Stage 3 · Grades 5–6数与代数
分数加减法
同分母直接加减分子；异分母先通分。
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Definition
：分数单位相同，数一数就行。异分母时先通分统一单位再加减——和整数「相同数位才能相加」是同一条道理。
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Prerequisites
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