Least Common Denominator

Front

What is the least common denominator (LCD)?

Back

The least common denominator (LCD) is the smallest multiple that two or more denominators share.

Front

How do you find the least common denominator of two fractions?

Back

To find the LCD, list the multiples of each denominator and find the smallest multiple that appears in both lists.

Front

Find the least common denominator of \(\frac{5}{12}\) and \(\frac{1}{10}\).

Back

60

Front

Find the least common denominator of \(\frac{2}{7}\) and \(\frac{2}{21}\).

Back

21

Front

Which of these numbers could NOT be a common denominator for \(\frac{2}{4}\) and \(\frac{3}{8}\)?

Back

12

Front

Find the least common denominator of \(\frac{2}{3}\) and \(\frac{4}{15}\).

Back

15

Front

Find the least common denominator of \(\frac{7}{9}\) and \(\frac{1}{6}\).

Back

18

Front

What is a common denominator?

Back

A common denominator is a number that can be used as a denominator for two or more fractions.

Front

Why is it important to find the least common denominator?

Back

Finding the LCD is important for adding, subtracting, or comparing fractions.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the least common multiple (LCM)?

Back

The least common multiple (LCM) is the smallest multiple that two or more numbers share, and it is used to find the least common denominator.