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Changing the subject of a formula
Rearrange formulas with squares, square roots and fractions — including ones where the new subject appears twice — to make any variable the subject.
⏱ 20 min❓ 9 questions
What you'll be able to do
- ✔I can use inverse operations in reverse order to change the subject of a formula
- ✔I can rearrange formulas that contain squares, square roots and fractions
- ✔I can make a variable the subject when it appears in more than one term
How this works
- 1Read the short explanations first — they teach you what you need before each question.
- 2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
- 3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.
What's inside
9 questions and 1 quick teaching card, including:
- 🔘Multiple choice — Tap the answer you think is best, then check it.
👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.
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Curriculum: AC9M10A01