18 - 9 = ?, 9, 27 + 5 = ?, 32, 45 - 31 = ?, 14, 30 + 29 = ?, 59, 14 + 12 = ?, 26, 97 - 34 = ?, 63, 49 + 49 = ?, 98, 74 - 21 = ?, 53, 22 - 11 = ?, 11, 10 x 2.5 = ?, 25, 5 x 7 = ?, 35, 80 ÷ 2 = ?, 40, 39 + 38 = ?, 77, 91 - 73 = ?, 18, 3 x 28 = ?, 84, 81 ÷ 9 = ?, 9, 33 x 3 = ?, 99, 74 + 26 = ?, 100

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