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 find the lowest common denominator (LCD) for two fractions?

Back

To find the LCD, list the multiples of each denominator and find the smallest multiple they have in common.

Front

What is the first step in adding mixed numbers?

Back

Convert the mixed numbers to improper fractions.

Front

How do you convert a mixed number to an improper fraction?

Back

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

Front

What is the process for subtracting mixed numbers?

Back

Convert to improper fractions, find the LCD, subtract the fractions, and convert back to a mixed number if necessary.

Front

Why can't we just add the numerators and denominators when adding fractions?

Back

Because the size of the pieces is different; you need a common denominator.

Front

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

Back

5 7/12.

Front

What is the result of 8 4/5 + 9 1/10?

Back

17 9/10.

Front

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

Back

3 5/6.

Front

What do you do if the result of a fraction addition is an improper fraction?

Back

Convert it to a mixed number.