The maths skills workbook with digital access help learners to develop their maths skills in the context of the Cambridge IGCSE™ Physics syllabus. These skills are crosslinked to the coursebook to help students understand how to use them. Practice exercises provide opportunities for learners to practise each maths skill. To support students in acquiring these skills, the exercises gradually increase in complexity. Practice questions provide opportunities for students to practise their skills in an active learning format such as discussion opportunities and pair work. Exam-style questions give students the chance to apply the skills they have learnt in an exam-style context. In the last chapter, students will need 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

Introduction
1. Representing values
Maths focus 1: Using units
Maths skill 1: Choosing the correct unit for a variable
Maths focus 2: Using symbols for variables
Maths skill 1: Using the symbol for each variable and its unit
Maths focus 3: Determining significant figures
Maths skill 1: Understanding place value
Maths skill 2: Determining a correct number of significant figures
Maths focus 4: Representing very large and very small values
Maths skill 1: Converting numbers to and from standard form
Maths skill 2: Interpreting and converting values with unit prefixes to and from standard form
Maths skill 3: Carrying out arithmetic operations in standard form
Maths focus 5: Estimating values
Maths skill 1: Knowing if a number is of the right order of magnitude
2. Working with data
Maths focus 1: Understanding and collecting data
Maths skill 1: Identifying types of data
Maths skill 2: Taking measurements
Maths focus 2: Recording and processing data
Maths skill 1: Designing results tables
Maths skill 2: Processing data in tables
Maths focus 3: Understanding variability in data
Maths skill 1: Judging the quality of data
3. Drawing graphs
Maths focus 1: Choosing axes and scales
Maths skill 1: Choosing which variable goes on each axis
Maths skill 2: Choosing the best axis scales for accuracy
Maths focus 2: Plotting the points and drawing a best-fit line
Maths skill 1: Plotting points accurately
Maths skill 2: Drawing a best-fit line
4. Interpreting data
Maths focus 1: Reading values from a graph
Maths skill 1: Interpolating values between known data points
Maths skill 2: Extrapolating a graph
Maths focus 2: Interpreting straight line graphs
Maths skill 1: Describing a relationship between variables on a straight-line graph
Maths skill 2: Determining the gradient and the intercept
Maths focus 3: Interpreting specific types of linear graphs
Maths skill 1: Interpreting the intersection of lines on a graph
Maths skill 2: Calculating the distance travelled from a speed–time graph
Maths focus 4: Interpreting curves on graphs
Maths skill 1: Extracting data from a curve on a graph
Maths skill 2: Determining when a relationship is inversely proportional
Maths skill 3: Interpreting graphs with regularly repeating patterns
Maths focus 5: Interpreting data in other types of chart
Maths skill 1: Interpreting pie charts
Maths skill 2: Interpreting bar charts
Maths skill 3: Interpreting Sankey diagrams
5. Doing calculations
Maths focus 1: Understanding equations
Maths skill 1: Working with equations: the basics
Maths skill 2: Calculating with percentages
Maths focus 2: Calculating values using equations
Maths skill 1: Using two equations
Maths skill 2: Using an equation of the form y1/y2 = x1/x2
Maths skill 3: Understanding the impact of changing variable size
Maths focus 3: Doing more complex calculations
Maths skill 1: Doing calculations involving several equations
Maths skill 2: Adding reciprocals
Maths focus 4: Calculations that involve direction: moments and momentum
Maths skill 1: Calculating moments
Maths skill 2: Solving momentum problems
Maths focus 5: Radioactive decay calculations
Maths skill 1: Doing particle calculations
Maths skill 2: Interpreting half-life information
6. Working with shape
Maths focus 1: Solving problems involving shape
Maths skill 1: Extracting information from diagrams
Maths skill 2: Calculating using the mathematics of shape
Maths focus 2: Drawing angles in ray diagrams
Maths skill 1: Drawing and measuring angles
Maths focus 3: Working with vectors
Maths skill 1: Using vector diagrams
Additional questions involving several maths skills
Equations
Glossary
Acknowledgements

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