Bonjour vous pouvez m’aider svp.merci

a. (5/6)+(-1/3)
= (5/6) + (-2/6)
= 3/6
= 1/2

b. (7/9)- (1/-27)
= (21/27) - (-1/27)
= (21/27) +1/27
= 22/27

c. -(8/5)+(23/50)
= -80/50 + (23/50)
= -57/50

d. (45/15)-(7/3)
= (9/3) - (7/3)
= 2/3

e. (4/11)+2
= (4/11) + (2/1)
= (4/11) + (22/11)
= 26/11

f. (8/-91)+(-1/7)
= (-8/91) + (-13/91)
= -21/91

g. (5/2) - (-45/4) + (2/8)
= (10/4) + (45/4) + (1/4)
= 56/4

h. 4 - (5/-49) + (- 8/7)
= (4/1) - (-5/49) + ( -56/49)
= (196/49) + (5/49) + ( -56/49)
= 145/49