Réponses

2014-09-05T21:07:05+02:00
A = 3 + 4 x 5 + 2 x (15 + 3)
A = 3 + 4 x 5 + 2 x 18
A = 3 + 20 + 36
A = 23 + 36
A = 59

B = 3/5 + 8/3
B = 3 x 3 / 5 x 3 + 8 x 5 / 3 x 5
B = 9/15 + 40/15
B = 49/15

C = 45/22 x 66/15
C = 2970/330
C = 330 x 9 / 330 x 1
C = 9/1
C = 9

D = 7/8 - 3/15 x 25/12

D = 7/8 - 75/180
D = 7 x 180 / 8 x 180 - 75 x 8 / 180 x 8
D = 1260/1440 - 600/1440
D = 660/1440
D = 60 x 11 / 60 x 24
D = 11/24