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Bonjour
Calculer les expressions suivantes
a. M=(+8) + (-3) - (- 7) + (+6) – (+12) + (-5).

b. N= (-4) – (-3) – (+15) +(-11)+(-7) – (-13).
c. P=(-11) + (-9) – (+6) – (-11) – (-13) + (+7).
c. K= (-15) – (-9) + (+1

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