Bonjour svp vous pouvez m'aider merci d'avance. 58 Calculer chaque expression. L=-17 - (-22,5) +9+(-12,5)
M= -5,7 + 15 - 11,5 - (-4,2)
N= 14,5 - 21 - 35,8 + 16,3​
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