Doubles : 5 + 5 =10, 6 + 6  =12, 7 + 7 = 14, 8 + 8 = 16, 9 + 9 =18 , Doubles + 1 : 5 + 6 = 11, 6 + 7 =13, 7 + 8 = 15, 8 + 9 =17,

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