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 1/3 and 3/9?

Back

The common denominator for 1/3 and 3/9 is 9, as it is the least common multiple of 3 and 9.

Front

What is the first step in adding fractions with different denominators?

Back

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

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

What is the rule for subtracting fractions?

Back

To subtract fractions, they must have the same denominator. If they don't, find a common denominator first.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

Back

Tags

CCSS.7.NS.A.1C

Front

What does it mean if fractions are 'like' fractions?

Back

Like fractions have the same denominator, making them easier to add or subtract.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

What does it mean if fractions are 'unlike' fractions?

Back

Unlike fractions have different denominators, requiring a common denominator to add or subtract.

Tags

CCSS.7.NS.A.1C