Bonsoir,
a)
4/4 - 3/4 = 1/4
c)
15/7 - 14/7 = 1/7
e)
6/3 +4/3 = 10/3
b)
21/7 -14/7 =7/7 = 1
d)
6/5 + 25/5 = 31/5
f)
7/9 + 81/9 = 90/9 = 9
