5th grade add and subtract fractions with unlike denominator

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 have unlike denominators?

Back

Unlike denominators are denominators that are not the same. For example, in the fractions 1/4 and 1/3, the denominators 4 and 3 are unlike.

Tags

CCSS.4.NF.A.2

Front

How do you add fractions with unlike denominators?

Back

To add fractions with unlike denominators, first find a common denominator, convert the fractions, and then add the numerators.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

How do you subtract fractions with unlike denominators?

Back

To subtract fractions with unlike denominators, find a common denominator, convert the fractions, and then subtract the numerators.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the least common denominator (LCD)?

Back

The least common denominator (LCD) is the smallest multiple that two or more denominators share.

Front

What is the first step in adding or subtracting fractions with unlike denominators?

Back

The first step is to find the least common denominator (LCD) for the fractions.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

Convert 1/4 to a fraction with a denominator of 20.

Back

1/4 = 5/20.

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Front

Convert 3/10 to a fraction with a denominator of 20.

Back

3/10 = 6/20.

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Front

What is the sum of 5/20 and 6/20?

Back

5/20 + 6/20 = 11/20.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

What is the difference between 8/9 and 1/3?

Back

8/9 - 1/3 = 5/9.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2