Adding and Subtracting Fractions No Mixed Numbers

Jimmy filled a pitcher 1/2 of the way full with water. Carolyn filled a pitcher of the same size 5/6 of the way full with water. How much more water did Carolyn fill than Jimmy?

• 1/6 more water

• 2/3 more water

• 1/3 more water

• 3/6 more water

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

1/5 + 4/15=

• 5/20

• 3/10

• 3/15

• 5/15

Sally is painting her house. She used 1/8 of a gallon of paint in her bathroom, and 2/6 of a gallon of paint in her bedroom. How much paint did she use in all?

• 11/24

• 3/14

• 3/24

• 11/14

Tim has a board that is 5/6 feet long. He painted 2/18 feet of his board last night. How much more does Tim have left to paint?

• 13/18

• 7/24

• 7/18

• 3/7

What is the least common denominator you could use to subtract 1/3 and 1/4?

• 3

• 4

• 24

• 12

What is the the next step to finding this answer?

• Add the numerators (1+1=2)

• Multiply 12 X 1 for both fractions to find a new numerator
  

• Multiply to find each new numerator by the multiple used to get 12. (3 X1) (4 X 1)

• This is a mistake, you don't need to convert to twelfths

What is the least common denominator of 1/4 and 1/3?

• 4

• 3

• 12

• 8

When you are adding and subtracting fractions, what is one of the first things you must do.

• Start adding and subtracting

• Find a common denominator

• Call a friend for help

• Panic

When adding and subtracting fractions, when do you use multiples?

• When you are trying to find the common denominator

• When you are simplifying fractions

• When your numbers are too small

• When your numbers are too large