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-7. Other than the topics of Plus/Minus/ Multiplication/Division/Square/BODMAS which were covered in Level-6, this level contains DECIMALS and percentage (%) also. It contains multiplication of triple-digit numbers with double as well as triple-digit numbers. BODMAS formulae have been explained in detail here. 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 6 Levels of the Abacus education.