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Sagot :

Réponse :

Explications étape par étape

Bonjour

A=(+7) + ((+1)-(-9)) + (-10)

A = 7 + 1 + 9 - 10

A = 7 + 10 - 10

A = 7

B =(-7) – ((+3)+(-10) -(-9)

B = -7 - 3 + 10 - 9

B = -10 + 10 - 9

B = -9

C=(+6) + (-4)-(-1)+(-4)​

C = 6 - 4 + 1 - 4

C = 7 - 8

C = (-1)

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