3 3/6 + 2 1/6 = 3 + 3/6 + 2 + 1/6

3 + 2 = 5 | 3/6 + 1/6 = 4/6

find the g c f of 4 and 6

4 | 2 × 2

6 | 2 × 3

the g c f of 4 and 6 is 2

4 ÷ 2 = 2

6 ÷ 2 3

5 + 2/3 = 5 2/3

the sum of 3 3/6 and 2 1/6 is 5 2/3

hope it helped ;-;