11/09/2026
GCSE — Rearranging Formulas | Function Machines
Changing the subject made simple! 🧮✨
Today’s concept from International GCSE Mathematics — Algebra & Functions 📚
When rearranging formulas, function machines help us trace each operation step-by-step. By applying inverse operations in reverse, isolating any variable becomes straightforward!
🔹 Identify the Subject: Locate the isolated variable
🔹 Build the Forward Path: Follow the order of operations from the initial variable
🔹 Apply Inverse Operations: Reverse the steps (addition ↔️ subtraction, multiplication ↔️ division)
🔹 Isolate the New Subject: Solve to get the final formula
Understanding the reverse process makes changing the subject effortless! 🎯
Solve this worksheet and share your solutions with us! DM me if you want more worksheets and practice questions like this to sharpen your skills. Now your turn! ✍️👇
📚 GCSE Edexcel Mathematics
✏️ Topic: Changing the Subject / Rearranging Formulas
🧠 Concept • Inverse Operations • Problem Solving
Maths is not about memorising — it’s about understanding the method. 💙
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