Réponses

2014-10-19T10:52:32+02:00
A) 3 + 8 X4
= 3+32
= 35

B) (-3,5 - 6,5) :(7,5-2,5)
= (-10) : 5
= -2

C) 24+(-6) + 9X4
= 18 + 36
= 54

D) 20 - [18-3 X (1+5) -4]
= 20 - [15 X 6 - 4]
= 20 - (90 -4)
= 20 - 86
= -66

E= 4 au carré - 2 X (4X7 - 40 : 5)
= 16 - 2 X (28 - 8)
= 16 - 2 X 20
= 16 - 40
= -24

F= 120 + [(66-(25+8-7)):2]
= 120 + [(66 - (26)) :2]
= 120 + (40: 2)
= 120 +20
= 140
Meilleure réponse !
2014-10-19T10:56:19+02:00
A = 3 + 8 x 4
A = 3 + 32
A = 35

B = (- 3,5 - 6,5) + (7,5 - 2,5)
B = - 10 + 5
B = - 5

C = 24 + (- 6) + 9 x 4
C = 24 - 6 + 36
C = 24 + 36 - 6
C = 60 - 6
C = 54

D = 20 - (18 - 3 x (1 + 5) - 4)
D = 20 - (18 - 3 x (6)) - 4)
D = 20 - (18 - 18) - 4)
D = 20 - (- 4)
D = 20 + 4
D = 24

E = 4² - 2 x (4 x 7 - 40 + 5)
E = 16 - 2 x (28 - 35)
E = 16 - 2 x (- 7)
E = 16 + 14
E = 30

F = 120 + ((66 - (25 + 8 - 7) + 2)
F = 120 + ((66 - (26) + 2)
F = 120 + (40 + 2)
F = 120 + (42)
F = 162