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Răspuns:
2/8 + 3/8 - 1/8 = 4/8
4/7 + 3/7 - 5/7 = 2/7
1/6 + 4/6 - 3/6 = 2/6
5/7 - 4/7 + 3/7 = 4/7
4/9 + 3/9 - 2/9 = 5/9
4/8 + 4/8 - 6/8 = 2/8