A l'aide je n'y arrive pas !

A= 7/6 + 11/4
B= 16/48 - 3/5
C= -4/5 (le moins est en face de la barre)+ 3/10
D= 0,4/15 - 2,3/3
E= 7/3 x -5/4
F= -2/7 x -7/9
G=(-4) x -11/8
H= -51/54 (le moins est en face de la barra) x 18/17

Merci c'est super important !!

1

Réponses

2014-09-07T12:05:33+02:00
A = 7/6 + 11/4
A = 7 x 4 / 6 x 4 + 11 x 6 / 4 x 6
A = 28/24 + 66/24
A = 94/24
A = 2 x 47 / 2 x 12
A = 47/12

B = 16/48 - 3/5
B = 16 x 5 / 48 x 5 - 3 x 48 / 5 x 48
B = 50/240 - 144/240
E = - 94/240
E = 2 x - 47 / 2 x 120
E = - 47/120

C = 4/ -5 + 3/10
C = - 4/5 + 3/10
C = - 4 x 2 / 5 x 2 + 3/10
C = - 8/10 + 3/10
C = - 5/10
C = 5 x - 1/ 5 x 2
C = - 1/10

D = 0,4/15 - 2,3/3
D = 0,4/15 - 2,3 x 5 / 3 x 5
D = 0,4/15 - 11,5/15
D = 0,4 x 10 / 15 x 10 - 11,5 x 10 / 15 x 10
D = 4/150 - 115/150
D = - 111/150
D = 3 x - 37 / 3 x 50
D = - 37/50

E = 7/3 x -5/4
E = - 35/12

F = -2/7 x -7/9
F = 14/63
F = 7 x 2 / 7 x 9
F = 2/9

G = (- 4) x -11/8
G = 44/8
G = 4 x 11 / 4 x 2
G = 11/2

H = 51/- 5  x 18/17

H = - 51/5 x 18/17
H = - 918/85
H = 17 x - 54 / 17 x 5
H = - 54/5