What is the first step in adding mixed numbers with unlike denominators?

Separate the whole number parts from the fraction parts.

Why is it important to find a common denominator when adding fractions?

To add fractions, they need to represent parts of the same whole, which is achieved by having a common denominator.

Grade 9th Grade · Math · 30 min

I can add mixed numbers with unlike denominators by finding a common denominator.

Khan Academy · 2:21

How to add mixed numbers that have unlike denominators | Fractions | Pre-Algebra | Khan Academy

3 key concepts

1
To add mixed numbers with unlike denominators, you can separate the whole number parts from the fraction parts.
2
To add fractions, you need to have the same denominator, and the least common multiple can be used to find this.
3
After adding the fractions, you may need to simplify the fraction to arrive at the final answer.

4 questions · Multiple choice & Short answer

Quick comprehension check

“Add the mixed numbers 23 and 5/12 + 11 and 1/4. Show all steps, including finding a common denominator and simplifying your answer.”

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Teacher GuideComplete lesson plan

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