 ISBN:9781108948364
 Format:Print/online bundle
 Subject(s):Chemistry
 Qualification:Cambridge IGCSE
 Author(s):Helen Harden
 Available from: May 2022
Skills focussed series, working towards endorsement, for examination from 2023; inspired by teachers, for teachers.
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Written by experts in both chemistry and mathematics based on research carried out by the Nuffield Foundation and the Association for Science Education (ASE)
Maths skills are crosslinked to other resources in the series to help students understand how to use them
Practice exercises gradually increase in complexity to support students in developing maths skills
Worked examples illustrate the concept, provide a skillsbased stepbystep approach to answering a question, helping learners to develop their thinking processes
The ‘Look out’ feature makes students aware of common misconceptions that might be holding them back
Examstyle students require students to select which maths skills they ought to apply in different contexts, without the structure and guidance provided in each of the chapters, helping them become confident, independent learners
The answers can be found online at www.cambridge.org/go.

 How to use this series
 How to use this book
 Introduction
 Maths skills grid
 1. Representing values
 Maths focus 1: Using units
 Maths skill 1: Choosing the correct unit
 Maths skill 2: Writing the unit symbol
 Maths skill 3: Writing symbols for derived units
 Maths focus 2: Understanding very large and very small numbers
 Maths skill 1: Understanding place value
 Maths skill 2: Understanding powers of 10
 Maths skill 3: Understanding unit prefixes
 Maths focus 3: Writing numbers in a required form
 Maths skill 1: Writing numbers in standard form
 Maths skill 2: Writing numbers to the required number of significant figures
 2. Working with data
 Maths focus 1: Collecting data
 Maths skill 1: Reading scales
 Maths skill 2: Recording to the correct number of decimal places
 Maths focus 2: Understanding types of data
 Maths skill 1: Identifying independent and dependent variables
 Maths skill 2: Distinguishing categorical, continuous and discrete data
 Maths focus 3: Recording and processing data
 Maths skill 1: Drawing tables
 Maths skill 2: Drawing tables to help process data
 Maths skill 3: Recording processed data to the correct number of significant figures
 3. Drawing charts and graphs
 Maths focus 1: Drawing bar charts
 Maths skill 1: Choosing a suitable scale for the vertical axis (yaxis)
 Maths skill 2: Drawing the bars
 Maths focus 2: Drawing pie charts
 Maths skill 1: Converting percentages to angles
 Maths skill 2: Drawing the sectors
 Maths focus 3: Drawing line graphs
 Maths skill 1: Choosing which variable goes on which axis
 Maths skill 2: Drawing the axes
 Maths skill 3: Plotting the data points
 Maths skill 4: Using a ruler to draw a bestfit line
 Maths skill 5: Drawing a bestfit curve freehand
 4. Interpreting data
 Maths focus 1: Interpreting charts
 Maths skill 1: Interpreting the heights of bars on a bar chart
 Maths skill 2: Comparing the sizes of sectors on a pie chart
 Maths focus 2: Reading values from a line graph
 Maths skill 1: Interpolating line graphs
 Maths skill 2: Extrapolating line graphs
 Maths skill 3: Finding the intercept
 Maths focus 3: Interpreting the shape of line graphs
 Maths skill 1: Recognising the shape of the graph
 Maths skill 2: Interpreting the changing gradient of a curve
 Maths skill 3: Calculating the gradient of a straightline graph
 5. Doing calculations
 Maths focus 1: Using basic mathematical operations in calculations
 Maths skill 1: Working out the correct calculation for relative formula mass
 Maths skill 2: Using mathematical operations in the correct order to calculate relative formula mass
 Maths skill 3: Calculating number of particles using powers of 10 (Supplement)
 Maths skill 4: Using positive and negative values to interpret the overall enthalpy change of a chemical reaction (Supplement)
 Maths focus 2: Calculating and using percentages
 Maths skill 1: Calculating percentage composition by mass
 Maths skill 2: Calculating percentage yield
 Maths skill 3: Calculating percentage purity
 Maths skill 4: Using percentages to calculate relative atomic mass
 Maths focus 3: Using mathematical formulae in calculations (Supplement)
 Maths skill 1: Substituting values into a mathematical formula
 Maths skill 2: Rearranging a mathematical formula
 Maths skill 3: Using titration results to calculate the concentration of a solution
 Maths focus 4: Calculating using proportional relationships
 Maths skill 1: Recognising directly and indirectly proportional relationships
 Maths focus 5: Calculating using ratios
 Maths skill 1: Using ratio to work out reacting masses
 Maths skill 2: Using ratio and moles to work out reacting masses (Supplement)
 6. Working with shape
 Maths focus 1: Comparing surface area and volume
 Maths skill 1: Calculating surface area
 Maths skill 2: Comparing the surface area to volume ratio
 Applying more than one skill
 Appendix: The Periodic Table
 Glossary
 Acknowledgements.
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