adding and subtracting fractions

Front

What is a fraction?

Back

A fraction represents a part of a whole. It consists of a numerator (top number) and a denominator (bottom number). For example, in the fraction 1/2, 1 is the part and 2 is the whole.

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

What does it mean to add fractions?

Back

Adding fractions means combining two or more fractions to find a total. To add fractions with the same denominator, simply add the numerators and keep the denominator the same.

Tags

CCSS.4.NF.B.3A

Front

What does it mean to subtract fractions?

Back

Subtracting fractions means finding the difference between two fractions. To subtract fractions with the same denominator, subtract the numerators and keep the denominator the same.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

How do you add fractions with different denominators?

Back

To add fractions with different denominators, first find a common denominator, convert the fractions to equivalent fractions with that denominator, and then add the numerators.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

How do you subtract fractions with different denominators?

Back

To subtract fractions with different denominators, find a common denominator, convert the fractions to equivalent fractions, and then subtract 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 shared multiple of the denominators of two or more fractions. It allows you to add or subtract fractions easily.

Front

Back

The first step is to find a common denominator. The common denominator for 3 and 6 is 6.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

Back

The first step is to find a common denominator. The common denominator for 9 and 3 is 9.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

Back

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

Back

Tags

CCSS.7.NS.A.1C