Least Common Multiples and Least Common Denominator

Front

What is the least common multiple (LCM)?

Back

The least common multiple (LCM) of two or more numbers is the smallest number that is a multiple of each of the numbers.

Front

What is a denominator in a fraction?

Back

The denominator is the bottom part of a fraction that shows how many equal parts the whole is divided into.

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

What is the least common denominator (LCD)?

Back

The least common denominator (LCD) is the smallest number that can be used as a common denominator for two or more fractions.

Front

How do you find the least common denominator (LCD) of 1/3 and 3/5?

Back

Find the LCM of the denominators 3 and 5, which is 15. So, the LCD is 15.

Front

What is an equivalent fraction?

Back

An equivalent fraction is a fraction that represents the same value as another fraction, even though the numerator and denominator are different.

Tags

CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Front

How can you create an equivalent fraction for 1/2 with a denominator of 4?

Back

Multiply the numerator and denominator of 1/2 by 2 to get 2/4.

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Front

Can you add fractions with different denominators?

Back

No, you cannot add fractions with different denominators without first finding a common denominator.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is an example of a common denominator for 1/6 and 5/18?

Back

Common denominators include 18, 36, and 108.

Front

Which number could NOT be a common denominator for 1/6 and 5/18?

Back

6 could NOT be a common denominator because it is not a multiple of 18.

Front

What is the first step to find the least common multiple (LCM) of two numbers?

Back

List the multiples of each number and find the smallest multiple that appears in both lists.