What is the process for subtracting fractions with different denominators?

Find a common denominator, convert the fractions, then subtract the numerators.

What is a common denominator?

A common denominator is a shared multiple of the denominators of two or more fractions. Example: For $$\frac{1}{3}$$ and $$\frac{1}{4}$$ , the common denominator is 12.

How do you simplify a fraction?

Divide the numerator and the denominator by their greatest common factor (GCF). Example: $$\frac{8}{12} = \frac{2}{3}$$ .

What is the importance of finding a common denominator?

Finding a common denominator allows you to accurately add or subtract fractions.

Add and Subtract Fractions Flashcards

Student preview

15 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is a fraction?

Back

A fraction represents a part of a whole and consists of a numerator (top number) and a denominator (bottom number).

2.

FLASHCARD QUESTION

Front

How do you add fractions with the same denominator?

Back

3.

FLASHCARD QUESTION

Front

How do you add fractions with different denominators?

Back

4.

FLASHCARD QUESTION

Front

What is a mixed number?

Back

5.

FLASHCARD QUESTION

Front

How do you convert an improper fraction to a mixed number?

Back

6.

FLASHCARD QUESTION

Front

What is the first step in subtracting fractions?

Back

Ensure the fractions have a common denominator. If not, find one.

7.

FLASHCARD QUESTION

Front

How do you subtract fractions with the same denominator?

Back

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