Réponses

2014-09-10T18:16:22+02:00
A = 14 x 4/21 - 10
A = 56/21 - 10
A = 56/21 - 10 x 21 / 1 x 21
A = 56/21 - 210/21
A = - 154/21
A = 7 x - 22 / 7 x 3
A = - 22/3

B = (3 x (- 7/3) - 6) x (2 x 5/3 + 4)
B = (- 21/3 - 6) x (10/3 + 4)
B = (- 21/3 - 6 x 3 / 1 x 3) x (10/3 + 4 x 3 / 1 x 3)
B = (21/3 - 18/3) x (10/3 + 12/3)
B = 3/3 x 22/3
B = 66/9
B = 3 x 22 / 3 x 3
B = 22/3

C = 5/2 : 3
C = 5/2 x 1/3
C = 5/10
C = 5 x 1 / 5 x 2
C = 1/2

D = 5 : 2/3
D = 5 x 3/2
D = 15/2

E = 1/4 : 3/20
E = 1/4 x 20/3
E = 20/12
E = 4 x 5 / 4 x 3
E = 5/3

F =      5/3 - 1___
     2 - 1/15 + 1/3
F =        5/3 - 1 x 3 / 1 x 3__________
     2 x 15 / 1 x 15 - 1/15 + 1 x 5 / 3 x 5
F =        5/3 - 3/3_____
     30/15 - 1/15 + 5/15
F = 2/3
     34/15
F = 2/3 : 34/15
F = 2/3 x 15/34
F = 30/102
F = 6 x 5 / 6 x 14
F = 5/17

Je ne voyais pas très bien j'espère que j'ai bien noté les opérations