2 + 2 = - 4, 3 + 3 = - 6, 4 + 4 = - 8, 5 + 5 = - 10, 6 + 4 = - 10, 7 + 3 = - 10, 2 + 8 =  - 10, 1 + 9 = - 10, 9 + 1 = - 10, 8 + 2 = - 10, 3 + 7 = - 10, 4 + 6 = - 10, 1 + 1 = - 2, 2 + 1 = - 3, 3 + 1 = - 4, 4 + 1 = - 5, 5 + 1 = - 6, 6 + 1 = - 7, 7 + 1 = - 8, 8 + 1 = - 9, 6 + 6 = - 12, 7 + 7 = - 14, 8 + 8 = - 16, 9 + 9 = - 18, 10 + 10 = - 20,

Addition Fact Fluency

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