Adding and Subtracting Fractions with Unlike Denominators
Grade 4•45 minutes•Add and subtract fractions and mixed numbers with unlike denominators, using fraction equivalence to calculate a sum or difference of fractions or mixed numbers with like denominators.
Learning Objective
I can use fraction equivalence to add and subtract fractions with unlike denominators accurately.
Practice Questions
This lesson includes 12 practice questions to reinforce learning.
View questions preview
1. Explain how to find the least common denominator (LCD) of two fractions. Provide an example using the fractions ⅓ and ¼.
2. Rewrite the fraction ⅔ so that it has a denominator of 12. Show your work.
3. If you have the fractions ⅖ and ⅗, what is their sum? Show how you found the common denominator and calculated the sum.
...and 9 more questions
Educational Video
Subtracting fractions with unlike denominators
Khan Academy