Think Mentals 3 is the 'how-to' guide for making mental maths calculations friendly. The book includes: 18 modelled computation strategies for addition, subtraction, multiplication and division; A fun and easy introductory unit to show students how to find, make and fix 'friendly' numbers; Over 30 weeks of carefully structured and differentiated mental computation questions; Strategy revision and core maths skills questions; Weekly assessment and a Student Assessment Profile; End of unit higher-order thinking activities.