Adding Subtracting Fractions with Models

When the denominators are not the same, I must find a...

• common numerator

• common denominator

• equivalent fraction

• mixed number

Once I have completed adding or subtracting fractions, I should always ____________ if possible.

• make equivalent fractions

• add again

• simplify

• multiply

What is the best common denominator for this problem?

• 6

• 8

• 24

• 48

When adding or subtracting fractions, I NEVER add or subtract the...

• numerators

• denominators

• mixed numbers

• equivalent fractions

What is the best common denominator for this problem?

• 5

• 2

• 20

• 10

After a holiday party, there was 5/6 of a cake left.  Some of the pieces of cake were chocolate, some of pieces were vanilla, and some of the pieces were carrot cake.  What fraction of a cake could be chocolate, vanilla, and carrot? Choose the correct number statement that represents the amounts of each type of cake that are remaining.

• 4/6 + 1/6 + 1/6

• 3/6 + 2/6 + 2/6

• 1/6 + 2/6 + 2/6

• 1/6 + 1/6 + 2/6

What is the sum of the fractions represented by the shaded and unshaded parts of the model?

• 3/3 + 5/5 = 2

• 3/8 + 5/8 = 8/8

• 1/2 + 2/6 = 3/8

• 2/8 + 3/8 = 5/8

What subtraction equation with the CORRECT answer could be demonstrated by the models below?

• 2 4/8 - 1/8 = 3/8

• 4/8 - 1/8 = 3/8

• 3 1/8 - 4/8 = 7/8

• 2 1/8 - 5/8 = 1 4/8

What mixed number does the following number sentence represent?

4/4 + 1/4 + 1/4 + 1/4

• 1 3/4

• 1 4/4

• 8 3/4

• 1 2/4

A milk jug contained 7 3/8 ounces of milk left in it. Melissa used 4 5/8 ounces for a recipe. How many ounces are left?

• 3 2/8

• 1 3/8

• 2 6/8

• 4 6/8