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Adding Fractions (Like Denominators) Worksheet with Answers

When adding fractions with like denominators, simply add the numerators and keep the denominator the same. Simplify answers where possible. The answer key is at the end of the worksheet.

Name: _________________________ Date: _________________________

Part 1: Basic Addition

Instructions: Add the following fractions. Write your answer in the simplest form.

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

Part 2: Visual Addition

Instructions: Look at the fraction bars described below. Each bar represents a fraction. Add the fractions and write the sum.

  1. 2/5 (two shaded parts out of five) + 1/5 (one shaded part out of five) = __________
  2. 3/8 (three shaded parts out of eight) + 2/8 (two shaded parts out of eight) = __________

Part 3: Word Problems

Instructions: Read each word problem and solve for the sum of the fractions.

  1. Mia ate 1/3 of a cake, and her brother ate 1/3. How much of the cake did they eat together?
    Answer: __________
  2. A gardener planted 2/6 of a row of flowers in the morning and 3/6 in the afternoon. How much of the row was planted in total?
    Answer: __________
  3. Sam read 3/10 of his book on Monday and 4/10 on Tuesday. What fraction of the book has he read?
    Answer: __________
  4. A recipe needs 1/8 cup of sugar and 3/8 cup of flour. What is the total amount of sugar and flour needed?
    Answer: __________

Part 4: Simplify the Sum

Instructions: Add the fractions and simplify the answer if possible.

  1. 3/12 + 5/12 = __________
  2. 2/5 + 2/5 = __________
  3. 4/8 + 2/8 = __________
  4. 6/10 + 3/10 = __________
  5. 1/6 + 1/6 = __________
  6. 5/15 + 5/15 = __________

Part 5: Challenge Problems

Instructions: These problems are a bit trickier. Add the fractions and simplify if needed.

  1. 7/9 + 2/9 = __________
  2. 5/7 + 3/7 = __________
  3. 4/6 + 3/6 = __________
  4. 9/12 + 5/12 = __________
  5. 8/10 + 7/10 = __________
  6. 5/8 + 7/8 = __________

Answer Key

Part 1: 1. 4/6 = 2/3, 2. 6/9 = 2/3, 3. 8/10 = 4/5, 4. 2/4 = 1/2, 5. 6/7, 6. 7/12, 7. 6/8 = 3/4, 8. 9/15 = 3/5

Part 2: 1. 3/5, 2. 5/8

Part 3: 1. 2/3, 2. 5/6, 3. 7/10, 4. 4/8 = 1/2

Part 4: 1. 8/12 = 2/3, 2. 4/5, 3. 6/8 = 3/4, 4. 9/10, 5. 2/6 = 1/3, 6. 10/15 = 2/3

Part 5: 1. 9/9 = 1, 2. 8/7 = 1 1/7, 3. 7/6 = 1 1/6, 4. 14/12 = 7/6 = 1 1/6, 5. 15/10 = 3/2 = 1 1/2, 6. 12/8 = 3/2 = 1 1/2

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