Fractions Improper and Mixed Numbers Adding and Subtracting

When adding and subtracting fractions, which value needs to be the same in all values being added/subtracted?

• Numerator

• Denominator

Which of the following fractions is improper?

• 1/5

• 2/9

• 11/7

• 2/5

-1  1/4  + -2  1/2 =  

• - 3  3/4

• - 3  1/4

• -2  3/4

• -3  1/2

What is the sum?

• 
• 
• 
• 

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

• 5/12

• 3/7

• 11/12

• 1/3

Juanita made a fruit salad. She put 3 7/8 cups of cantaloupe and 2 2/4 cups of honeydew melon in the salad.  How may cups of melon did she put in the fruit salad?

• 6  3/8 cups

• 6 cups

• 4 1/2 cups

• 1 1/4 cups 

Mathematical Equivalence

OFF

17  1/6 - 3  2/3

• 14  3/6

• 13  1/3

• 13  5/6

• 13  1/2

Is this a correct answer?

• Yes, the student correctly added.

• No, you cannot add unlike denominators

• No, 5 + 7 is not 12

• No, 2 + 3 is not 5