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Sagot :

Réponse:

A = 11 - 2 × [(-3) + (-21)]

A = 11 - 2 × (-24)

A = 11 - (-48)

A = 59

B = [3 + 4 × (-3) ] × 4

B = [3 -12] × 4

B = -9 × 4

B = -36

C = 7 + (-5) - 5

C = 2 - 5

C = -3

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