Subtracting Fractions

Front

What is the process for subtracting fractions with different denominators?

Back

1. Find the least common denominator (LCD) of the fractions. 2. Convert each fraction to an equivalent fraction with the LCD. 3. Subtract the numerators and keep the denominator the same. 4. Simplify the result if possible.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is a common denominator?

Back

A common denominator is a shared multiple of the denominators of two or more fractions, allowing them to be added or subtracted.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

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

Back

To find the LCD, list the multiples of each denominator and identify the smallest multiple that appears in both lists.

Front

What is the least common denominator of 1/3 and 1/4?

Back

The least common denominator of 1/3 and 1/4 is 12.

Front

What is the result of subtracting 8/15 and 1/6?

Back

The result of subtracting 8/15 and 1/6 is 11/30.

Tags

CCSS.7.NS.A.1C

Front

What is the result of subtracting 3/10 and 1/5?

Back

The result of subtracting 3/10 and 1/5 is 1/10.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the result of subtracting 11/12 and 1/8?

Back

The result of subtracting 11/12 and 1/8 is 19/24.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What must you have in order to add or subtract fractions?

Back

You must have common denominators to add or subtract fractions.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

What is the first step in subtracting fractions?

Back

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

Tags

CCSS.7.NS.A.1C

Front

Can you subtract fractions with different denominators directly?

Back

No, you cannot subtract fractions with different denominators directly; you must first convert them to have a common denominator.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2