Adding and Subtracting Fractions

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 add fractions?

Back

Adding fractions involves combining the parts represented by the fractions. If the denominators are the same, add the numerators. If they are different, find a common denominator first.

Tags

CCSS.4.NF.B.3A

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 they share.

Front

Can you add fractions with different denominators directly?

Back

No, you cannot add 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

Front

What is the process for subtracting fractions?

Back

Subtracting fractions is similar to adding. If the denominators are the same, subtract the numerators. If they are different, find a common denominator first.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is an example of adding fractions with the same denominator?

Back

Example: 1/4 + 2/4 = (1+2)/4 = 3/4.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

What is an example of adding fractions with different denominators?

Back

Example: 1/3 + 1/6. The LCD is 6, so convert 1/3 to 2/6. Then, 2/6 + 1/6 = 3/6 = 1/2.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the result of 5/8 + 3/4?

Back

Convert 3/4 to 6/8. Then, 5/8 + 6/8 = 11/8 or 1 and 3/8.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

How do you subtract 1/2 - 1/6?

Back

Find the LCD, which is 6. Convert 1/2 to 3/6. Then, 3/6 - 1/6 = 2/6 = 1/3.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2