Subtracting Fractions with Unlike Denominators

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).

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

What does it mean to subtract fractions?

Back

Subtracting fractions means finding the difference between two fractions.

Tags

CCSS.4.NF.B.3A

Front

What are unlike denominators?

Back

Unlike denominators are denominators that are not the same in two or more fractions.

Tags

CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Front

How do you subtract fractions with unlike denominators?

Back

To subtract fractions with unlike denominators, first find a common denominator, convert the fractions, and then subtract the numerators.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is a common denominator?

Back

A common denominator is a number that is a multiple of the denominators of two or more fractions.

Front

How do you find the least common denominator (LCD)?

Back

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

Front

What is the first step in subtracting fractions with unlike denominators?

Back

The first step is to find the least common denominator (LCD) of the fractions.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

Example: What is 4/5 - 1/20?

Back

15/20

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

Example: What is 3/4 - 2/10?

Back

11/20

Tags

CCSS.7.NS.A.1C

Front

Example: What is 8/9 - 1/3?

Back

5/9

Tags

CCSS.7.NS.A.1C