Abacus is a great tool to teach your child simple math such as counting, addition, subtraction, multiplication, and even division. This is A book of Level-8. Other than the topics of Plus/Minus/ Multiplication/ Division/Square/BODMAS / Decimals / and percentage which were covered in Level-7, this level contains CUBES also. It has multiplication of Four digit multiplicand with three digit multiplier, decimals of Triple and Four digit, division of Four digit dividend with one digit divisor. Also special emphasis on mental maths.