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Sagot :

Exercice 4:

A= -4 x 5 + 3
A= -20 + 3
A= -17

B= (3 - 4) x (-7 - 11)
B= (-1) x (-18)
B= 18

C= (3,5 - 7,5) - (-8 + 2)
C= (-4) - (-6)
C= -4 + 6
C= 2

D= 6 - 7 x (-2) / -2 -8
D= 6 + 14 / -10
D= 20 / -10
D= -2

Exercice 5:

A = a(b - c)

A = -4,7 (3 - (-7))
A = -4,7 (3 + 7)
A = -4,7 x 10
A = -47

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