Subtracting Fractions with Unlike Denominators

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 subtract fractions?

Back

Subtracting fractions means finding the difference between two fractions.

Tags

CCSS.4.NF.B.3A

Front

What are unlike denominators?

Back

Unlike denominators are denominators that are not the same in two or more fractions.

Tags

CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Front

How do you subtract fractions with unlike denominators?

Back

To subtract fractions with unlike denominators, first 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 a common denominator?

Back

A common denominator is a number that is a multiple of the denominators of two or more fractions.

Front

How do you find a common denominator for 3/5 and 5/10?

Back

The least common denominator for 3/5 and 5/10 is 10.

Front

What is the result of 3/5 - 5/10?

Back

1/10.

Tags

CCSS.7.NS.A.1C

Front

If Andrew ran 1/3 of a mile and swam 5/6 of a mile, how do you find how much farther he swam than ran?

Back

Convert both fractions to a common denominator and subtract: 5/6 - 1/3 = 3/6 = 1/2.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What fraction of a bag is left if you give away 1/3 and 1/5 of it?

Back

7/15 of the bag is left.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

How do you convert mixed numbers to improper fractions?

Back

Multiply the whole number by the denominator, add the numerator, and place that over the original denominator.