Răspuns:
Explicație pas cu pas:
Ca sa faci operatii cu fractii, mai intai le aduci la acelasi numitor.
11/12 - 1/6 = 11/12 - 2/12 = 9/12 = 3/4
5/36 - 1/9 = 5/36 - 4/36 = 1/36
19/20 - 4/5 = 19/20 - 16/20 = 3/20
5/7 - 3/14 = 10/14 - 3/14 = 7/14 = 1/2
20/63 - 2/9 = 20/63 - 14/63 = 6/63 = 2/21
11/24 - 5/12 = 11/24 - 10/24 = 1/24
5/18 - 1/6 = 5/18 - 3/18 = 2/18 = 1/9
1/4 - 3/16 = 4/16 - 3/16 = 1/16
