Rearranging Formulas

Making any letter the subject

An interactive lesson with 7 steps, about 6 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• A formula is an equation; rearrange it with the same balance moves.
• Undo the operations around the target letter in reverse order.
• Rearrange first, then substitute numbers.

Steps

1. Formulas are equations too
2. Journey time
3. Celsius from Fahrenheit
4. Radius from volume
5. A circular garden
6. Where the scales agree
7. Trapezium height