Răspuns:
Explicație pas cu pas:
a)
1/8 + 7/8 = (1 + 7)/8 = 8/8
3/8 + 7/8 = (3 + 7)/8 = 10/8
2/8 + 7/8 = (2 + 7)/8 = 9/8
6/8 + 7/8 = (6 + 7)/8 = 13/8
termini singur
b)
9/9 - 3/9 = (9 - 3)/9 = 6/9
5/9 - 3/9 = (5 - 3)/9 = 2/9
6/9 - 3/9 = (6 - 3)/9 = 3/9
termini singur