Adding & 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.2B

CCSS.3.NF.A.1

Front

What does it mean to have unlike denominators?

Back

Unlike denominators are when the bottom numbers of two or more fractions are different, making it impossible to add or subtract them directly.

Tags

CCSS.7.NS.A.1C

Front

How do you add fractions with unlike denominators?

Back

To add fractions with unlike denominators, first find a common denominator, convert the fractions, and then add 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, allowing them to be added or subtracted.

Front

How do you find a common denominator for 1/4 and 2/3?

Back

The least common multiple (LCM) of 4 and 3 is 12, so the common denominator is 12.

Front

Convert 1/4 to a fraction with a denominator of 12.

Back

1/4 = 3/12.

Tags

CCSS.4.NF.A.1

CCSS.3.NF.A.3B

Front

Convert 2/3 to a fraction with a denominator of 12.

Back

2/3 = 8/12.

Tags

CCSS.4.NF.A.1

CCSS.3.NF.A.3B

Front

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

Back

Find a common denominator for the fractions.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

If you have 3/5 and 1/2, what is the common denominator?

Back

The common denominator for 5 and 2 is 10.

Front

How do you simplify a fraction?

Back

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