Adding and Subtracting Fractions with unlike denominators( TM)

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 \(\frac{1}{2}\) and \(\frac{1}{3}\), the denominators 2 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 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

What is the first step in adding \(\frac{8}{9}\) and \(\frac{5}{6}\)?

Back

The first step is to find a common denominator, which for 9 and 6 is 18.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the first step in subtracting \(\frac{3}{4}\) from \(\frac{2}{10}\)?

Back

The first step is to find a common denominator, which for 4 and 10 is 20.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What do you do with the numerators when adding fractions?

Back

When adding fractions, you add the numerators together while keeping the common denominator.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

What do you do with the numerators when subtracting fractions?

Back

When subtracting fractions, you subtract the numerators while keeping the common denominator.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

What is the result of \(\frac{19}{20} - \frac{3}{10}\)?

Back

The result is \(\frac{13}{20}\).

Tags

CCSS.7.NS.A.1C