Bonjour je n'arrive pas a ces deux exercice a.(+5) - (-7) = ? e.(-2) - (+15) = ?

b.(-9) - (-1) = ? f. (+5) - (-22) = ?

c.(-3) - (5) = ? g. 27 - (-15) = ?

d.(-18) - 23 = ? h. (-31) - (-19) = ?


Voila le deuxieme exercie je les mis en piece jointe c'est l'exercice 14
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