Bonjour je n'arrive pas a faire ces exercices Merci de m'aider

1) Calculer chaque différence

a.(+5) - (-7) = ? e.(-2) - (+15) = ?
b.(-9) - (-1) = ? f. (+5) - (-22) = ?
c.(-3) - (5) = ? g. 27 - (-15) = ?
d.(-18) - 23 = ? h. (-31) - (-19) = ?


2) Je l'ai mis en piece jointe ce cerait plus facile ( y'a un shema )
Exercice 14

3)Calculer en detaillant

A= 7 + (-9) + 3 + (-11) + 100
B= -3 + 15 + 1000 + (-97) + 85

Voila merci d'avance
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