Adding & 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

Why can't we just add the numerators and denominators if we need to add two fractions with different denominators?

Back

Because the size of the pieces is different.

Front

What must you do first in order to add or subtract fractions with unlike denominators?

Back

Find a common denominator.

Front

How do you find a common denominator for two fractions?

Back

You can find the least common multiple (LCM) of the denominators.

Front

What is the first step to add 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 6½ as an improper fraction?

Back

13/2.

Front

How do you subtract fractions with unlike denominators?

Back

First, find a common denominator, then convert the fractions, and subtract the numerators.

Front

What is 8 2/4 - 3 2/3?

Back

4 5/6.

Front

What is the sum of 2/3 and 1 3/6?

Back

13/6 or 2 1/6.