Simplifying fractions math test, how to simplify fraction math quizzes for kids in third grade, fourth grade and fifth grade. Fractions are best to work with their simplified form, and this quiz entails the steps which are followed to simplify a fraction. To simplify fractions, the numerator and denominator of the given fraction have to be checked for a common factor. If both have a common factor, this factor is used to divide through both numerator and denominator and this process is repeated till no other factors can be found. At this point, the fraction is in its simplest form. This quiz is for third-grade students and can be attempted on mobile devices and computers, under the supervision of tutors or teachers.