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а) 10 = 1 + 2 + 7 = 1 + 3 + 6 = 1 + 4 + 5 = 2 + 3 + 5
б) 12 = 1 + 2 + 9 = 1 + 3 + 8 = 1 + 4 + 7 = 1 + 5 + 6 = 2 + 3 + 7 = 2 + 4 + 6 = 3 + 4 + 5