Adding and Subtracting Mixed Numbers with Like Denominators

Front

What is a mixed number?

Back

A mixed number is a whole number combined with a fraction, such as 2 1/2.

Tags

CCSS.3.NF.A.3C

Front

How do you add mixed numbers with like denominators?

Back

To add mixed numbers with like denominators, add the whole numbers together and then add the fractions. If the fraction sum is improper, convert it to a mixed number.

Tags

CCSS.7.NS.A.1C

Front

How do you subtract mixed numbers with like denominators?

Back

To subtract mixed numbers with like denominators, subtract the whole numbers and then subtract the fractions. If the fraction result is negative, borrow from the whole number.

Tags

CCSS.7.NS.A.1C

Front

What does 'like denominators' mean?

Back

Like denominators mean that the fractions have the same bottom number (denominator), such as 1/4 and 3/4.

Tags

CCSS.4.NF.B.3A

Front

What is the first step in adding mixed numbers?

Back

The first step is to add the whole numbers together.

Tags

CCSS.7.NS.A.1C

Front

What is the first step in subtracting mixed numbers?

Back

The first step is to subtract the whole numbers.

Tags

CCSS.7.NS.A.1C

Front

What do you do if the fraction sum is greater than 1 when adding?

Back

If the fraction sum is greater than 1, convert it into a mixed number and add it to the whole number.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What do you do if the fraction result is negative when subtracting?

Back

If the fraction result is negative, borrow 1 from the whole number, converting it into a fraction with the same denominator.

Tags

CCSS.7.NS.A.1C

Front

Example: 4 1/4 - 2 3/4 = ?

Back

1 2/4 or 1 1/2.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

Example: 3 7/9 - 1 8/9 = ?

Back

1 8/9.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D