Bonjour vrm besoin d aide svp 46 calculer chaque expression A = (- 12) + 8 + 15 - (+9)
B = 8 - (-7) - (-4) - 7
C = (- 9) - (+ 7) + (- 2) - (-14)
D = -(-6) + (-13) - (+8) - (- 12)​
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