This National 4 Study Guide for Mathematics covers all three mandatory units and also a complete practice added value unit test with detailed worked solutions. Each spread contains the key elements from each topic, as well as advice, formulae, diagrams and examples of exam standard with solutions and hints for every topic. Each spread ends with a section called Things To Do and Think About which will contain examples for you to practice. There will be solutions to all the examples in these sections and solutions to the More Practice section too.