The Entertaining Multiplication Table

"The Entertaining Multiplication Table": This book with windows will help you learn the multiplication table easily, quickly, and without cramming. Find 110 secret windows and open them. Uncover the mysteries hidden beneath them, and you will learn a lot of... interesting things:which number is the easiest to multiply;unusual ways to remember certain numbers;what will happen every time you multiply an even number by 5;the easiest way to multiply by 8;how to multiply "on your fingers". At the end of the book, there are fun problems to test your knowledge.