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