Key Stage 2 Problem Solving is a series of graded activity books helping children to sharpen their mathematical skills. It encourages them to apply their maths skills to a range of 'real-life' situations such as shopping & keeping score in games. Key Stage 2 Problem Solving Book 4 is particularly suitable for children who are preparing for the transition to Key Stage 3 & covers: reflection translation rotation of shapes averages (mode/median/mean) metric-imperial conversions percentages & decimal numbers converting fractions probability & using a calculator.