bonsoir vs pouvez m'aider svp

Bonsoir,

a)

5/6 -2/6 = 3/6 = 1/3

b)

21/27 + 1/27 = 22/27

c)

-80/50 +23/50 = -57/50

d)

45/15 -35/15 = 10/15 = 2/3

e)

4/11 + 22/11 = 26/11

f)

-8/91  - 13/91 = -11/91

g)

20/8 + 90/8  +2/8   =112/8 =14

h)

196/49 + 5/49 -  56/49 =145/49