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 Present Ways Of Making This Abstract Concept More Accessible. Other Books In The Series Include: 'chance', 'mental Strategies', '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.