Common denominators

The  exercise appears under the 4th grade (U.S.) Math Mission. This exercise practices rewriting fractions to have the same denominator.

Types of problems
There are three types of problems in this exercise:
 * 1) List the first five multiples of the denominator of each fraction in order.: This problem has two fractions and user is asked to list the first five multiples and find the common denominator of the fractions.
 * 2) Rewrite each fraction with a denominator of __.: This problem has two fractions and user is asked to rewrite them with a denominator of __.
 * 3) What number(s) could you use for the denominator?: This problem has two fractions and user is asked to find what number(s) they could use for the denominator. There may be more than one answer for this problem.

Strategies
Basic knowledge of fractions are required for this exercise.
 * 1) Although not needed, knowledge of multiplication is very helpful while doing this exercise.

Real-life Applications

 * 1) Fractions, decimals, and percents are used in many sports such as basketball to determine how many field goals the player has made over how many they missed.