4 + 4 =, 8, 7, 6, 1 + 1 = , 3, 1, 2, 9 + 9 = , 15, 18, 21, 10 + 10 = , 30, 20, 15, 3 + 3 , 7, 9, 6, 2+2, 4, 5, 2, 1, Double of 5, 5+5, 10+10, 4+14, 25, 6+6, 13, 41, 21, 12, 7+7, 14, 41, 40, 4, 8+8, 16, 6, 14, 61.

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