Adding and Subtracting Mixed Numbers

Front

What is a mixed number?

Back

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

Front

How do you add mixed numbers?

Back

To add mixed numbers, first add the whole numbers, then add the fractions. If the fractions have different denominators, find a common denominator.

Front

How do you subtract mixed numbers?

Back

To subtract mixed numbers, first subtract the whole numbers, then subtract the fractions. If the fractions have different denominators, find a common denominator.

Front

What is a common denominator?

Back

A common denominator is a shared multiple of the denominators of two or more fractions, used to add or subtract them.

Front

How do you find the lowest common denominator (LCD)?

Back

To find the LCD, list the multiples of each denominator and find the smallest multiple that they share.

Front

What is the first step in adding or subtracting mixed numbers?

Back

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

Front

What is the result of 6 1/2 - 2 2/3?

Back

3 5/6.

Front

What is the result of 8 6/9 - 3 2/5?

Back

5 12/45.

Front

What is the result of 1 1/3 + 4 1/4?

Back

5 7/12.

Front

What is the result of 8 5/7 - 7 2/3?

Back

1 1/21.