My Book of Simple Addition 2009 г Мягкая обложка, 80 стр ISBN 1934968153 инфо 2717j.
This book focuses on helping children learn how to add the numbers 1 and 2 to other numbers This very basic mathematical skill cannot be acquired through repetition alone By using this book, children will beанргр able to understand, without difficulty, the concept of addition by first repeatedly tracing and reciting numbers and then gradually shifting to addition formulas that include the numbers 1 and 2.