Adding and Subtracting Fractions
Learning Objective
I can add and subtract fractions with unlike denominators.
Key Concepts
When subtracting fractions with unlike denominators, you must first find a common denominator by finding the least common multiple between the denominators.
After finding the least common multiple, you must rename the fractions to have the common denominator before subtracting the numerators.
After subtracting, always check to see if the answer can be simplified by finding the greatest common factor between the numerator and the denominator.
Practice Questions
This lesson includes 8 practice questions to reinforce learning.
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1. What is the first step when subtracting fractions with unlike denominators?
2. What is the least common multiple (LCM)? Explain why finding the LCM is important when subtracting fractions.
3. Explain the process of renaming a fraction. Why is it important to rename fractions when subtracting with unlike denominators?
...and 5 more questions
Educational Video
Subtracting Fractions with Unlike Denominators | Math with Mr. J
Math with Mr. J