Adding and Subtracting Fractions with Unlike Denominators: Grade 5 Math Worksheet – PDF Download

Grade 5 Add Fractions Worksheet: problems 1–5

Problem 1: Add with fraction bars

The bars show one half and one fourth. Find the sum.

Problem 2: Rename fractions

Find the missing numerator n.

1. \(\frac{1}{3} = \frac{n}{12}\)
2. \(\frac{3}{4} = \frac{n}{12}\)
3. \(\frac{5}{6} = \frac{n}{12}\)
4. \(\frac{2}{5} = \frac{n}{20}\)

Problem 3: Find the least common denominator

Find the least common denominator of each pair of fractions.

1. \(\frac{1}{6}\text{ and }\frac{3}{4}\)
2. \(\frac{2}{5}\text{ and }\frac{3}{10}\)
3. \(\frac{5}{8}\text{ and }\frac{1}{12}\)
4. \(\frac{4}{9}\text{ and }\frac{5}{6}\)

Problem 4: Add fractions with sums less than 1

Find each sum.

1. \(\frac{1}{2} + \frac{1}{3}\)
2. \(\frac{1}{4} + \frac{2}{5}\)
3. \(\frac{3}{8} + \frac{1}{4}\)
4. \(\frac{2}{9} + \frac{1}{6}\)

Problem 5: Add fractions with sums greater than 1

Find each sum. Write each answer as a mixed number.

1. \(\frac{2}{3} + \frac{3}{4}\)
2. \(\frac{5}{6} + \frac{5}{8}\)
3. \(\frac{3}{5} + \frac{7}{10}\)
4. \(\frac{7}{12} + \frac{5}{8}\)

Grade 5 Add Fractions Worksheet: problems 6–10

Problem 6: Subtract fractions with unlike denominators

Find each difference. Simplify each answer.

1. \(\frac{3}{4} – \frac{1}{3}\)
2. \(\frac{5}{6} – \frac{1}{4}\)
3. \(\frac{7}{8} – \frac{1}{2}\)
4. \(\frac{4}{5} – \frac{3}{10}\)

Problem 7: Subtract on a number line

The number line shows a jump back from five sixths to one half. Find \(\frac{5}{6} – \frac{1}{2}\).

Problem 8: Find the missing fraction

Find the fraction that makes each equation true.

1. \(\text{?} + \frac{1}{4} = \frac{7}{12}\)
2. \(\frac{5}{6} – \text{?} = \frac{1}{2}\)
3. \(\frac{3}{4} – \text{?} = \frac{3}{8}\)
4. \(\text{?} + \frac{2}{5} = \frac{9}{10}\)

Problem 9: Add mixed numbers

Find each sum. Write each answer as a mixed number.

1. \(2\frac{1}{2} + 1\frac{1}{3}\)
2. \(3\frac{1}{4} + 2\frac{2}{5}\)
3. \(1\frac{3}{4} + 2\frac{1}{2}\)
4. \(4\frac{5}{6} + 1\frac{3}{8}\)

Problem 10: Subtract mixed numbers

Find each difference.

1. \(5\frac{3}{4} – 2\frac{1}{3}\)
2. \(6\frac{1}{2} – 2\frac{3}{4}\)
3. \(4\frac{1}{6} – 1\frac{5}{8}\)
4. \(7 – 3\frac{2}{5}\)

Grade 5 Add Fractions Worksheet: problems 11–15

Problem 11: Estimate with benchmarks

Estimate each answer by rounding each fraction to 0, 1/2, or 1. Do not find the exact value.

1. \(\frac{7}{8} + \frac{1}{10}\)
2. \(\frac{5}{12} + \frac{6}{11}\)
3. \(\frac{3}{7} + \frac{1}{8}\)
4. \(\frac{11}{12} – \frac{4}{9}\)

Problem 12: Is the answer reasonable?

Liam says that \(\frac{2}{3} + \frac{1}{2} = \frac{3}{5}\). Explain why his answer cannot be correct, then find the correct sum.

Problem 13: Add with twelfths bars

Use the bars to find \(\frac{1}{3} + \frac{1}{4}\).

Problem 14: Compare sums and differences

Compare each pair using <, >, or =.

1. \(\frac{1}{2} + \frac{1}{3}\) and \(\frac{4}{5}\)
2. \(\frac{3}{4} – \frac{1}{6}\) and \(\frac{1}{2}\)
3. \(\frac{2}{3} + \frac{1}{4}\) and \(\frac{11}{12}\)
4. \(\frac{5}{6} – \frac{1}{3}\) and \(\frac{2}{3}\)

Problem 15: Add three fractions

Find each sum.

1. \(\frac{1}{2} + \frac{1}{3} + \frac{1}{6}\)
2. \(\frac{1}{4} + \frac{1}{6} + \frac{1}{3}\)
3. \(\frac{2}{5} + \frac{1}{2} + \frac{1}{10}\)

Grade 5 Add Fractions Worksheet: problems 16–20

Problem 16: Flour and oats

Maya pours 2/3 cup of flour and 1/4 cup of oats into a measuring cup. How much do the dry ingredients fill?

Problem 17: Running miles

Noah runs 3/4 mile on Monday and 5/6 mile on Tuesday. How far does he run in all?

Problem 18: Pizza night

A pizza is cut into 8 equal slices. Sofia eats 3/8 of the pizza and Jamal eats 1/4 of it.

1. What fraction of the pizza do they eat together?
2. What fraction is left?

Problem 19: Ribbon for a gift

A roll has 5 1/2 yards of ribbon. Ava uses 2 3/4 yards for a gift box. How much ribbon is left?

Problem 20: Walk to the park

Mei walks 2 1/3 miles to the library and then 1 7/8 miles to the park.

1. Estimate the total distance by rounding each distance to the nearest half mile.
2. Find the exact distance.

Grade 5 Add Fractions Worksheet: problems 21–23

Problem 21: Flour and sugar

Diego uses 4 1/4 cups of flour and 2 2/3 cups of sugar in a recipe. How many more cups of flour than sugar does he use?

Problem 22: Trail mix

Aisha makes 10 pounds of trail mix. She uses 3 1/2 pounds of nuts and 2 3/4 pounds of raisins. The rest is chocolate chips. How many pounds of chocolate chips does she use?

Problem 23: Homework time

Priya studies 1 1/4 hours on Monday, 3/4 hour on Tuesday, and 1 1/2 hours on Wednesday. Her goal is 4 hours for the three days.

1. How many hours does she study in all?
2. By how many hours does she miss her goal?

How to use this grade 5 add fractions worksheet

Print this grade 5 add fractions worksheet as a PDF, solve every problem on paper, then compare with the answer key.

See every chapter on the Grade 5 math page.