Strategies and process skills to develop mental calculation Learn to do these MENTALLY! Adding and subtracting up to 5-digit Numbers Multiplying and dividing up to 3-digit Numbers Adding and Subtracting Fractions Multiplying and Dividing Decimals Squaring Numbers 52 Practice & Revision Papers (1 a week!) for effective mental workout Over 500 Questions to sharpen mental arithmetic Answers provided for quick self-assessment.