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Adding and Subtracting Fractions with the Same Denominator

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Adding and Subtracting Fractions with the Same Denominator

When fractions have the same denominator, add or subtract the numerators and keep the denominator. Simplify your answer if you can.

Choose the answer

Select the correct result for each calculation.

1.What is 2/7 + 4/7?

6/14
6/7
4/7
8/7

2.Calculate 3/9 + 5/9.

8/18
8/9
7/9
8/8

3.Work out 9/11 − 6/11.

3/11
3/0
15/11
6/11

4.What is 7/8 − 3/8?

4/8
10/8
4/0
3/8

Work out each fraction

Write each answer as a fraction. Simplify where possible.

5.Calculate 3/8 + 2/8.

6.Calculate 4/10 + 3/10.

7.Work out 10/12 − 7/12.

8.Find the sum of 5/6 and 1/6.

9.Show how you calculate 5/8 + 2/8. Include the fraction you get before simplifying.

10.Explain why the denominator does not change when you add two fractions that name equal-sized parts.

Fractions in everyday situations

Read each problem carefully and show the fraction calculation.

11.At the school canteen, Arjun eats 2/8 of a tray of savoury slice and Ngaio eats 3/8 of the same tray. What fraction of the tray do they eat altogether?

12.Manaia has 8/10 of a bottle of water left. She drinks 3/10 of the bottle. What fraction of the bottle remains?

13.Select every pair that adds to exactly one whole.