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 find a common denominator?

Back

To find a common denominator, identify the least common multiple (LCM) of the denominators.

Front

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

Back

The first step is to find a common denominator for the fractions.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the formula for subtracting fractions?

Back

The formula is: (a/b) - (c/d) = (a*d - b*c) / (b*d) where a/b and c/d are the fractions.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is 7/8 - 1/6?

Back

17/24

Tags

CCSS.7.NS.A.1C

Front

What is 9/10 - 3/4?

Back

3/20

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is 3/5 - 5/10?

Back

1/10

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is 3/4 - 2/10?

Back

11/20

Tags

CCSS.7.NS.A.1C