MathIQO worksheet
Evaluate algebraic expressions by substituting values for a variable · Grade 6 · C2.3
Name: ______________________
Date: ______________________
- 1
Evaluate 2 × n + 5 when n = 8.
Warm-upAnswer:
- 2
Evaluate 4 × n + 9 when n = 5.
Warm-upAnswer:
- 3
Evaluate 2 × n + 3 when n = 9.
Warm-upAnswer:
- 4
Evaluate 6 × n − 62 when n = 12.
On levelAnswer:
- 5
Evaluate 6 × n − 6 when n = 6.
On levelAnswer:
- 6
Evaluate 4 × n − 9 when n = 5.
On levelAnswer:
- 7
Evaluate 4 × a + 5 × b when a = 8 and b = 7.
ChallengeAnswer:
- 8
Evaluate 3 × a + 5 × b when a = 3 and b = 8.
ChallengeAnswer:
- 9
Evaluate 3 × a + 6 × b when a = 2 and b = 2.
ChallengeAnswer:
✅ Done? See how you did — check in at mathiqo.com/check-in
Worksheet code: eyJzIjoiYWxnZWJyYS1leHByZXNzaW9ucy1ldmFsdWF0ZSIsImQiOlsyMDkyNTEyMzI2LDE1MjUxMjA3NzEsNjk5MDk4MjgsNTQ5NjAwNTA3LDE3ODQxMzE5OTYsNzg0MTk2MDM5LDE3OTMzNjM4MDMsMTgzODY3ODM1NCwxNDA2NjA1MjI0XSwidiI6MX0.f9f553b68a0b
A quick 5-question check-in grades itself instantly and shows what to practise next.
Answer key · Evaluate algebraic expressions by substituting values for a variable
- 1.21 — 2 × 8 = 16, then + 5 = 21.
- 2.29 — 4 × 5 = 20, then + 9 = 29.
- 3.21 — 2 × 9 = 18, then + 3 = 21.
- 4.10 — 6 × 12 = 72, then − 62 = 10.
- 5.30 — 6 × 6 = 36, then − 6 = 30.
- 6.11 — 4 × 5 = 20, then − 9 = 11.
- 7.67 — 4 × 8 = 32 and 5 × 7 = 35, so the sum is 67.
- 8.49 — 3 × 3 = 9 and 5 × 8 = 40, so the sum is 49.
- 9.18 — 3 × 2 = 6 and 6 × 2 = 12, so the sum is 18.