Subtracting Fractions with Different Denominators
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Objective
I can subtract fractions with unlike denominators by finding a common denominator.
Part 1 of 4
Warm-up video
Math with Mr. J · 8:38Vetted channel
We don't generate video — this one is by Math with Mr. J on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
When subtracting fractions with unlike denominators, you must first find a common denominator by finding the least common multiple between the denominators.
- 2
To rename a fraction, multiply both the numerator and the denominator by the same number to get an equivalent fraction with the common denominator.
- 3
After subtracting the numerators, always check to see if the answer can be simplified by dividing the numerator and denominator by their greatest common factor.
Part 3 of 4
Practice
12 questions
What is the first step in subtracting fractions with unlike denominators?
Why is it beneficial to find the least common multiple (LCM) when subtracting fractions?
Part 4 of 4
Exit ticket
Quick comprehension check
“Solve: ⅚ - ⅜. Show all steps, including finding a common denominator and simplifying your answer.”
Sample answer included in the free materials
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