Substitution (Year 6)
Practise substitution within Algebra for Year 6, with worked examples and instant feedback.
The questions below are generated to match the National Curriculum for Year 6 and get harder as you progress from Rookie to Guru.
Worked examples
RookieRead and interpret directly.
Which is an EXPRESSION (not an equation)?
- 3x + 5
- 3x + 5 = 11
- x = 4
- x + 7 = 10
Answer: 3x + 5. No equals sign = expression.
ProCompare and infer.
If x = 3 and y = 4, what is x² + y?
- 13
- 10
- 31
- 12
Answer: 13. 3² = 9; 9 + 4 = 13.
GuruMulti-step reasoning.
If a + b = 10 and a − b = 4, what is the value of a?
- 3
- 5
- 7
- 8
Answer: 7. Add the two equations: 2a = 14, so a = 7. (And b = 10 − 7 = 3.)
Related skills
Frequently asked questions
- What is substitution?
- Practise substitution within Algebra for Year 6, with worked examples and instant feedback.
- How can my child practise substitution 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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