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The subject and the balance method

The subject and the balance method

A formula connects variables, and the subject is the letter that already stands alone on one side of the equals sign. In the formula A=lwA = lwA=lw, the subject is AAA.

Changing the Subject of a Formula Lesson

  1. GCSE
  2. /Maths
  3. /Changing the Subject of a Formula

Step-by-step lessons covering OCR GCSE Maths Changing the Subject of a Formula for Foundation and Higher tier. Each lesson works through exam-style questions in the written papers format. Build fluency with number, ratio and algebra first, since geometry, probability and statistics topics rely on them, and leave extra time nearer the exam for Higher-tier problem-solving and multi-step reasoning questions.

Lessons

Writing a Ratio as a Fraction or Linear FunctionDirect and Inverse ProportionReverse PercentagesStandard FormSpeed and DensityChanging the Subject of a FormulaExpanding and Factorising QuadraticsSolving QuadraticsDrawing Quadratic GraphsSimultaneous EquationsSolving Simultaneous Equations GraphicallyGradient of a LineEquation of a LineSpheres and ConesSector Areas and Arc LengthsSimilar Shapes (Lengths)Exact trig valuesProbability TreesVenn Diagrams