One In The 'new Action Maths' Series Of Resource Books Designed To Provide Primary School Teachers With Activities For Developing Students Understanding Of The Major Concepts Of Mathematics. The Activities In This Book 'mental Strategies' Provide Activities Which Allow Children To Develop Effective Ways To Solve Or Visualise Mathematical Situations. Other Books In The Series Include: 'chance', 'place Value', 'counting Pattern And Order', 'the Four Operations', 'decimals', 'space And Shape' And 'fractions'. Includes A List Of Outcomes And Key Outcomes Based On The Current Curriculum Guidelines And Reproducible Worksheets.