Exo 6 et 7 svp merci beaucoup

6) 3/4 + 1/12
= 3*3/4*3 +1/12
= 9/12 + 1/12 = 10/12

3/10 - 5/100 
= 3*10/10*10 - 5/100 = 30/100 - 5/100 = 25/100

7/15+1/3
= 7/15 + 1*5/3*5 = 7/15 + 5/15 = 12/15

17/6 - 1/2
= 17/6 - 1*3/2*3 = 17/6 - 3/6 = 14/6


Ex 7 :

1 + 1/12
= 1*12/1*12 + 1/12 = 12/12 + 1/12 = 13/12

2/3 + 1
= 2/3 + 1*3/1*3 = 2/3 + 3/3 = 5/3

1 - 3/4
= 1*4/1*4 - 3/4 = 4/4 - 3/4 = 1/4

8/7 - 1
= 8/7 - 1*7 / 1*7 = 8/7 - 7/7 = 1/7 

bon courage