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Per means divide

Per means divide

Two formula triangles showing distance-speed-time and mass-density-volume with units The word "per" means divide. So average speed is distance per time, and density is mass per volume.

Speed and Density Lesson

  1. GCSE
  2. /Maths
  3. /Speed and Density

Step-by-step lessons covering OCR GCSE Maths Speed and Density 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