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Sagot :

Bonjour

A = - 50 + 35 - 15 - 45 + 55

A = - 50 - 15 - 45 + 35 + 55

A = - 110 + 90

A = - 20

B = - 40 + 20 - 50 + 30 + 60

B = - 40 - 50 + 20 + 30 + 60

B = - 90 + 110

B =  20

C = - 75 + 125 - 250 - 75 + 150

C = - 75 - 75 - 250 + 125 + 150

C = - 400 + 275

C = - 125

D = 1 200 + 2 400 - 2 900 + 1 600 - 1 700

D = 1 200 + 2 400 + 1 600 - 2 900 - 1 700

D = 5 200 - 4 600

D = 600.

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