Adding and Subtracting Mixed Numbers

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

• add the numerators

• add the denominators

• find a common denominator

• find a common numerator

April has 2/3 cup sugar and Mike has  1 3/6 cups of sugar. How much do they have together? 

• 13/6 or  2 1/6

• 2 whole

• 2 1/2 

• 3 whole

6½ - 2⅔

• 4  1/6

• 3  5/6

• 4  1/2

• 3  1/2

8  2/4 - 3  2/3=
Simplify/Reduce if needed.

• 5  2/12

• 4  5/6

• 11  1/6

• 8  2/3

What is the sum?

• 
• 
• 
• 

Jerome wants to walk to school. He lives 2 1/4 miles away. So far, he has walked 7/8 of a mile. How far does he have left to go?

• 1 3/8

• 2 6/4

• 1 6/8

• 2 3/4

Add the mixed numbers vertically. Simplify if needed.

What is the process of making two fractions with unlike denominators able to be added or subtracted called?

• Finding the least common multiple or least common denominator

• Addition

• Multiplication

• Reverse multiplication

Find Lowest Common Denominator & solve
1   3/7      +       7   5/11 =

• 8   68/77

• 8   68/107

• 8   10/77

• 8    8/18