What you’ll learn5 learning objectivesChoose one objective for a focused lesson, or study the complete topic.—M.1—Prefixes, units, symbols and standard formUse biological units and prefixes including G, M, k, m, micro and n; select appropriate units; use decimal and standard form; interpret symbols such as less than, greater than, less than or equal to, greater than or equal to, proportional to, solidus in units and sum notation.Syllabus objective—M.2—Calculator use, estimations and significant figuresUse a calculator for arithmetic, squares, square roots, reciprocals, logarithms and means; estimate calculation results; record experimental data with appropriate precision; keep justified significant figures in calculated quantities.Syllabus objective—M.3—Magnification, actual size and geometryCalculate magnifications and actual sizes; calculate areas of triangles, rectangles and circles; calculate perimeters and circumferences; calculate surface areas and volumes of cuboids and cylinders.Syllabus objective—M.4—Averages, ratios, percentages and experimental errorCalculate mean, median, mode and range; recognise and use ratios; calculate percentages and percentage changes; express errors in experimental work as percentage errors.Syllabus objective—M.5—Graphs, data transformation and rates of changeTranslate information between graphical, numerical and algebraic forms; construct and interpret line graphs, pie charts, bar charts and histograms; choose suitable graph types; orient and scale axes correctly; choose straight joins or best-fit lines; calculate rates of change from gradients and tangents.Syllabus objective