Bonsoir qlq pourrait m’aider pour l’ex 60 svp?

Bonsoir,

H

4/3 -2/6 = 8/6 -2/6 = 6/6 = 1

5/4 +3/8 = 10/8 + 3/8= 13/8

1*8/13 = 8/13

I=

1/18 +2/9 = 1/18 +4/18 = 5/18

5/6 -1 = 5/6 -6/6 = -1/6

5/18 * -6/1 = -30/18 = -15/ 9 =  -5/3