What is the new numerator when converting $$\frac{1}{3}$$ to have a denominator of 24?

Multiply the numerator by 8: $$\frac{1 \times 8}{3 \times 8} = \frac{8}{24}$$ .

What is the new numerator when converting $$\frac{1}{8}$$ to have a denominator of 24?

Multiply the numerator by 3: $$\frac{1 \times 3}{8 \times 3} = \frac{3}{24}$$ .

What is the first step to subtract $$\frac{6}{5} - \frac{1}{2}$$ ?

Find the least common multiple of the denominators (5 and 2), which is 10.

What is the new numerator when converting $$\frac{6}{5}$$ to have a denominator of 10?

Multiply the numerator by 2: $$\frac{6 \times 2}{5 \times 2} = \frac{12}{10}$$ .

What is the new numerator when converting $$\frac{1}{2}$$ to have a denominator of 10?

Multiply the numerator by 5: $$\frac{1 \times 5}{2 \times 5} = \frac{5}{10}$$ .

What is a fraction with unlike denominators?

Fractions that have different denominators, such as $$\frac{1}{3}$$ and $$\frac{1}{4}$$ .

Why is it important to find a common denominator?

A common denominator allows you to accurately add or subtract fractions.

What is the process of finding a common denominator called?

Finding the least common multiple (LCM) of the denominators.

What is the definition of a numerator?

The numerator is the top number of a fraction that indicates how many parts are being considered.

Subtract Fractions with Unlike Denominators Flashcards

Student preview

15 questions

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1.

FLASHCARD QUESTION

Front

What do you need to find when adding or subtracting fractions with unlike denominators?

Back

You need to find the least common multiple (LCM) to change your denominator.

Tags

CCSS.7.NS.A.1C

2.

FLASHCARD QUESTION

Front

When do you simplify fractions?

Back

You simplify all the time unless the fraction is already simplified.

3.

FLASHCARD QUESTION

Front

Back

Find the least common multiple of the denominators (3 and 8), which is 24.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

4.

FLASHCARD QUESTION

Front

Back

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

5.

FLASHCARD QUESTION

Front

Back

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

6.

FLASHCARD QUESTION

Front

Back

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

7.

FLASHCARD QUESTION

Front

What is the least common multiple of 5 and 2?

Back

The least common multiple (LCM) of 5 and 2 is 10.

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