Répondre :
Bonjour;
a. 3+4/11
3*11/11 = 33/11
33/11 +4/11 = 37/11
b. 9+3/7
9*7/7 = 63/7
63/7+3/7 = 70/7 = 10
c. 11+2/9
11*9/9 = 99/9
99/9+2/9 = 101/9
d. 20+1/4
20*4/4= 80/4
80/4 +1/4 = 81/4
e. 4+5/12
4*12/12 = 48/12
48/12+5/12
= 53/12
f. 8+7/15
8*15/15 = 120/15
120/15 +7/15 = 127/15
g. 39+1/2
39*2/2 = 78/2
78/2 +1/2 = 79/2
h. 4+13/25
4*25/25 = 100/25
100/25+13/25 = 123/25