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

Addition to 20 fluency

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