Respuesta :

dakotalynn733

Answer:

1. 4/5

2. 7/10

3. 3/10

4. 2/3

Step-by-step explanation:

1. 6/10 + 2/10

6 + 2 = 8

8/10 = 4/5

2. 9/20 + 5/20

9 + 5 = 14

14/20 = 7/10

3. 2/5 - 1/10

2 × 2 = 4

5 × 2 = 10

4/10 - 1/10

4 - 1 = 3

3/10

4. 5/12 + 1/4

1 × 3 = 3

4 × 3 = 12

5/12 + 3/12

5 + 3 = 8

8/12 = 2/3