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 a combo pack of “A & B” books of Level-6, The topics which are covered in this level are Plus/Minus/ Multiplication/ Division/Square/BODMAS. It has the division of four-digit numbers with the one-digit number. Multiplication of Double-digit by double-digit number, Square of Double-Digit numbers, and introduction to BODMAS formulae. It helps in the whole brain development of a child. These Books are very attractive and of very good quality. These books are suitable for those students only, who have completed the first 5 Levels of Abacus education.