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-6, The topics which are covered in this level are Plus/Minus/ Multiplication/ Division/Square/BODMAS. It has a division of four-digit dividend by one digit divisor. Multiplication of Double-digit multiplicand by the double-digit multiplier, Square of Double-Digit numbers, and introduction to BODMAS formulae.