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.
Solve: x + 5 = 12.
- x = 7
- x = 17
- x = 5
- x = 12
Answer: x = 7. Subtract 5: x = 7.
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.
Mia is 4 years older than Tom. The sum of their ages is 30. How OLD is Mia?
- 17
- 13
- 26
- 21
Answer: 17. Tom: x; Mia: x+4. Sum: 2x+4 = 30; x = 13; Mia = 17.
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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