Bonjour,est ce que vous pouvez m'aider pour l'exercice 23 svp.

Bonjour,

a. 5/6 + 1/3
= 5/6 + 1 x 2 / 3 x 2
= 5/6 + 2/6
= 7/6

b. 7/9 - 1/ - 27
= 7/9 + 1/27
= 7 x 3 / 9 x 3 + 1/27
= 21/27 + 1/27
= 22/27

c. - 8/5 + 23/50
= - 8 x 10 / 5 x 10 + 23/50
= - 80/50 + 23/50
= - 57/50

d. 45/15 - 7/3
= 45/15 - 7 x 5 / 3 x 5
= 45/15 - 35/15
= 10/15
= 5 x 2 / 5 x 3
= 2/3

e. 4/11 + 2
= 4/11 + 2 x 11 / 1 x 11
= 4/11 + 22/11
= 26/11

f. 8/- 91 + - 1/7
= - 8/91 - 1/7
= - 8 x 7 / 91 x 7 - 1 x 91 / 7 x 91
= - 56/637 - 91/637
= - 147/637
= 49 x - 3 / 49 x 13
= - 3/13

g. 5/2 - - 45/4 + 2/8
= 5/2 + 45/4 + 2/8
= 5 x 4 / 2 x 4 + 45 x 2 / 4 x 2 + 2/8
= 20/8 + 90/8 + 2/8
= 112/8
= 8 x 14 / 8 x 1
= 14

h. 4 - 5/- 49 + (- 8/7)
= 4 + 5/49 - 8/7
= 4 x 49 / 1 x 49 + 5/49 - 8 x 7 / 7 x 7
= 196/49 + 5/49 - 56/49
= 201/49 - 56/49
= 145/49