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 the denominator of a fraction represent?

Back

The denominator indicates how many equal parts the whole is divided into.

Tags

CCSS.3.NF.A.2B

CCSS.3.NF.A.1

Front

What does the numerator of a fraction represent?

Back

The numerator shows how many parts of the whole are being considered.

Tags

CCSS.3.NF.A.2B

CCSS.3.NF.A.1

Front

What is an unlike denominator?

Back

Unlike denominators are denominators that are different from each other, making it necessary to find a common denominator to add or subtract the fractions.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the lowest common denominator (LCD)?

Back

The lowest common denominator is the smallest number that can be used as a common denominator for two or more fractions.

Front

How do you find the lowest common denominator for 1/5 and 1/2?

Back

The LCD of 1/5 and 1/2 is 10.

Front

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

Back

The first step is to find the lowest common denominator (LCD) for the fractions.

Tags

CCSS.7.NS.A.1C

Front

When adding fractions, what do you do with the denominators?

Back

You keep the denominators the same after finding the LCD.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

When adding or subtracting fractions, what do you do with the numerators?

Back

You add or subtract the numerators after adjusting the fractions to have a common denominator.

Tags

CCSS.4.NF.B.3D

CCSS.4.NF.B.3C

Front

What is an example of adding fractions with unlike denominators?

Back

To add 1/4 and 1/6, first find the LCD (12), convert the fractions to 3/12 and 2/12, then add to get 5/12.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2