This brilliant illustrated puzzle and activity book will help children aged 6+ to learn to add and subtract. With fun puzzles and activities and lively full color illustrations throughout children will learn with ease and be entertained for hours on end. A companion book to the fantastic Times Tables Puzzle & Activity Book, this title echoes the fun-learning feel in another important area of math and help children learn numeracy skills outside of the classroom. ABOUT THE SERIES: Brain Boosters is an engaging educational series, full of mind-boggling puzzles and activities which are designed to test the math and logic skills of young readers.