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Sagot :

Réponse:

A= 7+5+(-11)+4+(-7)

A= (-12)

B= (+13) + (-5) + (-14) + (-17) + 13

B= -10

C= (-2.8) + (-3.7)+(-4,1) +(-2,3) + (-4.5)

C= -17.4

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