12 + 8 = ?, 20, 10, 28, 16, 20 - ? = 8, 8, 12, 2, 28, 9 + 9 = ?, 18, 28, 17, 0, 18- ? = 9, 27, 9, 8, 12, 7 + 7 = ?, 16, 14, 0, 15, ? - 7= 7, 7, 15, 14, 16, 6 + 6 = ?, 13, 12, 0, 14, 12 - ? = 6, 6, 16, 18, 9, 16 + ? = 20, 14, 36, 8, 4, 20- 4 = ?, 6, 16, 14, 4, 20 - 16 =?, 4, 36, 14, 8, 8 + 8 = ?, 14, 16, 0, 18, 16 - 8 = ?, 8, 24, 9, 7, 20 - 17= ?, 3, 13, 27, 5, 17 + ? = 20, 13, 3, 23, 37, 7 + 5 + 3= ?, 23, 15, 8, 12, 6 + 6 + 2 =, 12, 18, 14, 8, 9 + 8 + 1, 9, 17, 19, 18, 10 + 12 + 8 = ?, 20, 18, 30, 22, 16 + 7 + 3 =, 26, 19, 10, 25, 9 + 9 =, 18, 19, 9 + 8 =, 17, 16, 7 + 7 =, 15, 14, 7 + 8 =, 15, 14, 6 + 6 = ?, 12, 14, 7 + 6 =, 14, 13, 4 + 4 =, 8, 14, 4 + 5 =, 9, 8, 11 + 11=, 22, 21, 11 + 12 =, 23, 22

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