15 + 5 = ? - 20, 20 + 6 = ? - 26, 13 + 5 = ? - 18, 17 + 2 = ? - 19, 15 + 1 = ? - 16, 4 + 5 = ? - 9, 11 + 2 = ? - 13 , 4 + 11 = ? - 15 , 5 + 11 = ? - 16 , 6 + 9 = ? - 15, 6 + 8 = ? - 14, 10 + 2 = ? - 12, 10 + 9 =? - 19, 3 + 10 = ? - 13, 2 + 17 = ? - 19, 3 + 12 = ? - 15, 12 + 5 = ? - 17, 8 + 10 = ? - 18, 11 + 6 = ? - 17, 4 + 15 = ? - 19,

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