27 - 6 = ?, 27 - 9 = ?, 200 - 100 = ?, 55 - 5 = ?, 55 - 7 = ?, 19 - 7 = ?, 32 - 11 = ?, 35 - 23 = ?, 123 - 12= ?, 223 - 101 = ?, 99 - 90 = ?, 67 - 2 = ?, 12 - 8 = ?, 500 - 200 = ?, 48 - 6 = ?, 30 - 10 - 10 = ?, 75 - 57 = ?, 84 - 39 = ?, 4 - 3 = ?, 10 - 6 = ?, 54 - 23 = ?, 99 - 41 = ?, 83 - 80 = ?, 50 - 25 = ?, 97 - 12 = ?.

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