Instructions
To find the common denominator of two or more fractions, follow the steps outlined below. You may use the space provided to write your answers or notes.
Step 1: Identify the denominators
Write down the denominators of the fractions you want to find a common denominator for.
Step 2: Find the Least Common Multiple (LCM)
Use the denominators to find the least common multiple (LCM). Show your work below.
Step 3: Confirm the common denominator
Write the LCM identified in step 2 as your common denominator.
Practice Problems
Find the common denominator for the following pairs of fractions. Show your work and write down the common denominator you find.
1. 1/4 and 1/6
2. 2/3 and 5/12
3. 3/5 and 2/7
Reflection
Why is it important to find a common denominator when adding or subtracting fractions?