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 multiplication of double and triple-digit multiplicand by the single-digit multiplier and also a division of Triple-Digit dividends with a single-digit divisor. Basically this level is for the thorough practice of the first four levels before going further towards the toughest part of this education.