Addition of Fractions Exercises – Set 1

Find the sum of the following.

  1. 1/8 + 2/8 + 3/8
  2. 2/5 + 1/4
  3. 5/8 + 7/12
  4. 1/15 + 3/5 + 1/3
  5. 4 + 3/5
  6. 2 1/3 + 1/2
  7. 3 3/4 + 7/10
  8. 6 1/5 + 2 7/15 + 1/3
  9. 3 + 7 1/8 + 4/5
  10. 9 1/2 + 11/3

Solution and Answers

1. 3/4

2. 13/20
LCD: 20
8/20 + 5/20 = 13/20

3. 1 1/6
LCD: 24
15/24 + 14/24 = 29/24 = 1 5/24

4. 1
LCD: 15
1/15 + 9/15 + 5/15 = 15/15 = 1

5. 4 3/5
4 3/5

6. 2 5/6
LCD: 6
2 2/6 + 3/6 = 2 5/6

7. 4 9/20
LCD: 20
3 15/20 + 14/20
= 3 29/20 = 4 9/20

8. 9
LCD: 15
6 3/15 + 2 7/15 + 5/15
= 8 15/15 = 9

9. 10 37/40
LCD: 40
3 + 7 5/40 + 32/40
= 10 37/40

10. 13 1/6
LCD: 6
9 3/6 + 22/6
= 9 25/6 or 13 1/6

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