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-4. Book “A” is for classwork and Book “B” is for homework. Daily “Oral” practice of 10 minutes is mandatory for the students. Dailly practice tracker has been given at the start of book-B. The “Dictation Book” for oral practice is also available here. These Books are very attractive and are of very good quality. Level-4 covers the topics of Plus and Minus of triple-digit numbers mentally, multiplication of triple-digit multiplicand with the single-digit multiplier. It also contains the division of Double and triple-digit dividends with the single-digit divisor.