472+27×2×7=44 移动一根火柴让算式成立

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472+27×2×7=44 移动一根火柴让算式成立
472+27×2×7=44 移动一根火柴让算式成立

472+27×2×7=44 移动一根火柴让算式成立
472-27×2×7=94

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472-27×2×7≠44