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

Addition and Subtraction 1 to 20

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