Adding Decimals (Year 4)
Practise adding decimals within Decimals for Year 4, with worked examples and instant feedback.
The questions below are generated to match the National Curriculum for Year 4 and get harder as you progress from Rookie to Guru.
Worked examples
RookieRead and interpret directly.
What is 0.3 + 0.5?
- 0.2
- 0.35
- 0.8
- 1.0
Answer: 0.8. 3 tenths + 5 tenths = 8 tenths = 0.8.
ProCompare and infer.
What is 0.4 + 0.86?
- 1.36
- 0.9
- 1.26
- 1.16
Answer: 1.26. Write 0.4 as 0.40, then add column by column: 0.40 + 0.86 = 1.26.
GuruMulti-step reasoning.
Convince another pupil that 0.25 = 1/4. Show your reasoning.
- 0.25 = 25/100 = 1/4 (divide both top and bottom by 25).
- 0.25 has 25 in it and 4 quarters make 100.
- Because both equal 1/2.
- Because the digits look similar.
Answer: 0.25 = 25/100 = 1/4 (divide both top and bottom by 25).. 0.25 = 25/100. Simplify by dividing both by 25: 1/4.
Related skills
Frequently asked questions
- What is adding decimals?
- Practise adding decimals within Decimals for Year 4, with worked examples and instant feedback.
- How can my child practise adding decimals at home?
- Work through the examples below, then start a free adaptive session. Northstar adjusts the difficulty automatically and tracks mastery over time.
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