Free Year 7 Substitute into a formula Practice | Skillo
Skillo provides free Year 7 NAPLAN Substitute into a formula practice (AC9M7A01) for Australian students. No signup, no email, no credit card. Practice questions aligned with the ACARA Australian Curriculum v9.0 strand. Open and start in 10 seconds.
Year 7 students facing their third NAPLAN need to be confident with substitute into a formula. Recognise and use variables to represent everyday formulas algebraically and substitute values to determine an unknown. Skillo has targeted practice questions for this exact skill, mapped to the Australian Curriculum v9.0, free and ready to go.
No account needed. No email. No credit card.
What does the Year 7 NAPLAN Substitute into a formula test cover?
- Recognise and use variables to represent everyday formulas algebraically and substitute values to determine an unknown.
- Questions may include word problems set in real Australian contexts
- Both calculator and non-calculator question types are covered
Try a sample Substitute into a formula question
Question 1 — Easy
Kofi is designing a square patio with a diagonal length of 8 metres. What is the area of the patio to the nearest square metre? (Use the relationship: area = diagonal² ÷ 2)
Answer: Area = 8² ÷ 2 = 64 ÷ 2 = 32 m².
Question 2 — Medium
Zac uses the formula d = s × t to calculate distance, where s is speed and t is time. Find the value of d when s = 12 and t = 3.
Answer: Substituting s = 12 and t = 3 gives d = 12 × 3 = 36. Option A adds s + t = 12 + 3 = 15 instead of multiplying. Option B divides s ÷ t = 12 ÷ 3 = 4, reversing the formula. Option C subtracts t from s to get 12 − 3 = 9.
Question 3 — Hard
The formula for the perimetre of a rectangle is P = 2l + 2w. Find the value of P when l = 9 and w = 4.
Answer: Substituting l = 9 and w = 4 gives P = 2(9) + 2(4) = 18 + 8 = 26. Option B incorrectly multiplies all four values together (9 × 4 = 36). Option C adds l and w without multiplying by 2 (9 + 4 = 13). Option D multiplies 2 × 9 × 4 = 72, confusing the perimetre formula with area.
How should my child prepare for Year 7 NAPLAN Substitute into a formula?
- Select Year 7 and Numeracy on the home screen
- Use Quick Practice — questions on substitute into a formula will appear as part of the session
- Check the Skill Breakdown on your profile to track your accuracy on substitute into a formula specifically
- Review explanations after each question to understand the reasoning behind correct answers
Skillo is free, requires no email or account details, and is built specifically for Australian students. Every question is mapped to the Australian Curriculum v9.0 and filtered by skill so your child practises exactly what they need.
Common questions about NAPLAN Substitute into a formula
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Is Skillo really free?
Yes. Skillo is completely free for all Australian students — no subscription, no credit card, no hidden paywall. No free trial that converts to paid.
Does my child need an account?
No. Skillo doesn't require an account to practise. Open any page and start immediately — no email, no registration.
Does Skillo collect any personal information?
No. Skillo is built to require zero personal information. No name, no email, no date of birth is collected from students.
Is Skillo affiliated with NAPLAN?
Skillo's NAPLAN-style practice is authored independently. NAPLAN® is a registered trademark of ACARA. Skillo is not affiliated with, endorsed by, or sponsored by ACARA.
No account needed. No email. No credit card.
About this practice
Skillo's NAPLAN-style practice is authored independently. NAPLAN® is a registered trademark of ACARA. Skillo is not affiliated with, endorsed by, or sponsored by ACARA.