Add/Subtract Fractions With Like And Unlike Denominators

• 18

• 24 

•   27

• 36 

• 45

Look at the problem. What step is taking place?

• Add the numerators, then add the denominators

• Add the denominators (3 + 4 = 7).

• Simplify the answer

• 2

• 14

• 7

• 28

Carefully following a recipe, Ben used exactly 5/8 of a cup of oil and 3/4 of a cup of water. How many cups of liquid did Ben use in all?

You go out for a long walk. You walk 3/4 mile and then sit down to take a rest. Then you walk 3/8 of a mile. How far did you walk altogether?

• 3/8

• 1/12

• 1 1/8

• 1/2

Solve.

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

What is the difference of 7/8 - 1/3 ?

• 13/24

• 8/11

• 6/5

• 6/8

Marty made two types of cookies.  He used 2/3 cups of sugar for one recipe and 1/4 cup of sugar for the other.  How much sugar did he use in all?

• 3/7

• 5/12

• 11/12