There are many ways to teach numbers to kids. Abacus is a great tool to teach your child simple math such as counting, addition, subtraction, multiplication, and even division. This is the “A” book of Level-5, which contains Plus and Minus of Double and Triple Digit numbers. It has the multiplication of double and triple-digit numbers by single-digit numbers and also the division of Triple-Digit numbers with the single-digit numbers. Basically, this level is for the thorough practice of the first four levels before going further towards the toughest part of this education. It helps in the whole brain development of a child. These Books are very attractive and of very good quality. This book is suitable for those students only, who have completed the first 4 Levels of Abacus education.