Đúng, 16 + 2 = 18, 5 + 8 = 13, 6 + 11 = 17, 0 + 19 = 19, 6 + 6 = 12, 0 + 1 = 1, 5 + 3 = 8, 8 + 4 = 12, Sai, 11 + 1 = 3, 7 + 4 = 20, 14 + 12 = 16, 5 + 9 = 9, 15 + 2 = 2, 10 + 2 = 6, 16 + 18 = 18

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