Pls pls pls help me with thiss

Answer:
1. 2/3
2. 2/5
3. 7/12
Step-by-step explanation:
1. 1/6 + 3/6 = 4/6 > simplify > 2/3
2. 3/5 - 1/5 = 2/5
3. 4/12 + 3/12 = 7/12