Up to now, the student has already learned the concept of division. This module introduces some divisibility rules that will allow the student to solve more difficult equations even faster. So again, the concept of taking a more difficult problem and making it more simple and easy.
This module introduces rules to determine quickly if a large number is divisible by 2, 3, 5, 6 or 9. This kind of problem solving skill is valuable for so many aspects of life.