Răspuns:
Explicație pas cu pas:
1.
a) 17/41 + 8/41 = 25/41
b) 11/25 + 3/50 = 22/50 + 3/50 = 25/50 = 1/2
c) 7/12 + 5/18 = 21/36 + 10/36 = 31/36
2.
a) 14/37 - 9/37 = 5/37
b) 7/9 - 4/27 = 21/27 - 4/27 = 17/27
c) 11/6 - 13/9 = 33/18 - 26/18 = 7/18
3.
1 - 5/12 - 1/3 = 12/12 - 5/12 - 4/12 = 7/12 - 4/12 = 3/12 = 1/4
