Adding & Subtracting Mixed Numbers with Unlike Denominators

Front

What is a mixed number?

Back

A mixed number is a whole number combined with a fraction, such as 2 1/3.

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 mixed numbers with unlike denominators?

Back

The first step is to find the lowest common denominator (LCD) for the 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 with unlike denominators?

Back

1. Find the LCD. 2. Convert the fractions to equivalent fractions with the LCD. 3. Subtract the whole numbers and the fractions.

Front

What is the result of 1 3/7 + 7 5/11?

Back

8 68/77.

Front

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

Back

5 12/45.

Front

How do you add fractions with unlike denominators?

Back

Convert them to equivalent fractions with a common denominator, then add the numerators.

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.