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 involves finding the difference between two fractions, which may require finding a common denominator.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

How do you find a common denominator for two fractions?

Back

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

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 do you convert mixed numbers to improper fractions?

Back

Multiply the whole number by the denominator, add the numerator, and place the result over the original denominator.

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

How do you subtract fractions with the same denominator?

Back

Subtract the numerators and keep the denominator the same.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

What is the result of 1/4 - 2/3?

Back

To solve, convert to a common denominator: 1/4 = 3/12 and 2/3 = 8/12. Then, 3/12 - 8/12 = -5/12.

Tags

CCSS.7.NS.A.1C

Front

What is the result of 3/5 - 5/10?

Back

Convert 3/5 to 6/10. Then, 6/10 - 5/10 = 1/10.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

How do you simplify a fraction?

Back

To simplify a fraction, divide the numerator and denominator by their greatest common factor (GCF).