Sagot :
Bonjour,
A=120-15x(21-18)
A = 120 - 15 x 3
A = 120 - 45
A = 75
B=7X(11-(3+4))
B = 7 x (11 - 7)
B = 7 x 4
B = 28
C=(43+67)x(( 12-10)x2+16)
C = 110 x (2 x 2 + 16)
C = 110 x (4 + 16)
C = 110 + 20
C = 2 200.
D- mal posée
Réponse:
A. 120-15×(21-18)
A.120-(15×21-15×18)
A.120-(315-270)
A.120-45
A.75