5th grade simplifying fractions Coffee quiz game - A fraction contains a numerator and denominator. In some cases, the numerator has a common factor with the numerator. In other cases, the later is bigger than the former. In the case of common factors, both numbers are divided until they no longer have any common factors. In that state, the fraction can be considered as a simplified fraction or a fraction that has been reduced to its lowest terms. In some cases students will reduced a fraction to a decimal number. Simplifying fractions is an important skill which students will encounter a lot when adding, subtracting, dividing and multiplying fractions. This activity is in the form of an online math quiz which students can use to review directly on the internet. It is for students in 4th, 5th and 6th grade.