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Sagot :

12-6+5 = 12-11 = 1

5x[4+(2+3x6)] = 5x(4 + 20) = 20 + 100 = 120

24-6:2 = 24-3 = 21

42-4x9 = 42-36 = 6

(+7)-(-3+5)+(4-(3)) = 7 +3 - 5 + 4 - 3 = 7+4-5 = 11-5 = 6

(-2)-[2-(3=-3+5)] = -2 -2 + (3?2) = -4 + 3?2

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