calculer sous forme fractionnaire détailler merci d) 5/6--3/-5 e) -3+7/4 f) 7,5/6-11/8 g) -1/11+5/12 h) -6/20+8/-6 i) 8/9-40/12

Bonjour,

D = 5/9 - - 3/- 5
D = 5/9 - 3/5
D = 5 x 5 / 9 x 5 - 3 x 9 / 5 x 9
D = 25/45 - 27/45
D = - 2/45

E = - 3 + 7/4
E = - 3 x 4 / 1 x 4 + 7/4
E = - 12/4 + 7/4
D = - 5/4

F = 7,5/6 - 11/8
F = 7,5 x 4 / 6 x 4 - 11 x 3 / 8 x 3
F = 30/24 - 33/24
F = - 3/24
F = 3 x - 1 / 3 x 8
F = - 1/8

G = - 1/11 + 5/12
G = - 1 x 12 / 11 x 12 + 5 x 11 / 12 x 11
G = - 12/132 + 55/132
G = 43/132

H = - 6/20 + 8/- 6
H = - 6/20 - 8/6
H = - 6 x 3 / 20 x 3 - 8 x 10 / 6 x 10
H = - 18/60 - 80/60
H = - 98/60
H = 2 x - 49 / 2 x 30
H = - 49/30

I = 8/9 - 40/12
I = 8 x 4 / 9 x 4 - 40 x 3 / 12 x 3
I = 32/36 - 120/36
I = - 88/36
I = 4 x - 22 / 4 x 9
I = - 22/9