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 a common denominator for 3/9 and 1/3?

Back

The least common denominator (LCD) for 3 and 9 is 9. Convert 1/3 to 3/9 to add.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the result of 3/9 + 1/3?

Back

2/3.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

Can you add fractions with different denominators directly?

Back

No, you must first convert them to have a common denominator.

Tags

CCSS.7.NS.A.1C

Front

What is the process for subtracting fractions?

Back

Similar to addition, subtracting fractions requires a common denominator. If the denominators are the same, subtract the numerators.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

What is the result of 3/7 - 1/8?

Back

17/56.

Tags

CCSS.7.NS.A.1C

Front

What is an improper fraction?

Back

An improper fraction is a fraction where the numerator is greater than or equal to the denominator.

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

What is a mixed number?

Back

A mixed number combines a whole number and a proper fraction, such as 1 1/2.

Tags

CCSS.3.NF.A.3C