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

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

Front

What do you do after finding the LCD when adding fractions?

Back

Convert each fraction to an equivalent fraction with the LCD, then add the numerators.

Front

What is the process for subtracting mixed numbers?

Back

1. Find the LCD. 2. Convert fractions. 3. Subtract whole numbers and fractions separately.

Front

Why can't we just add the numerators and denominators of fractions with different denominators?

Back

Because the size of the pieces is different; the fractions must be equivalent.

Front

What is an improper fraction?

Back

An improper fraction is a fraction where the numerator is greater than or equal to the denominator, such as 9/4.

Front

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

Back

Divide the numerator by the denominator; the quotient is the whole number, and the remainder is the new numerator.

Front

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

Back

5 7/12.

Front

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

Back

1 1/21.