Răspuns:
Explicație pas cu pas:
1.
a). 1/2 si 1/3=3/6+2/6=5/6
b). 2/3 si 11/12=8/12+11/12=19/12
c). 7/16 si 11/24=21/48+22/48=43/48
2.
a). 1/6 si 2/7= 7/42<12/42
b). 5/7 si 33/55=275/385>231/385
3.
3/4; 7/9; 11/12= 27/36; 28/36; 33/36
descrescator: 33/36; 28/36; 27/36
