Adding and Subtracting Fractions with Models

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

Becky ordered an extra-large pizza. She and her family ate 7/12 of the pizza. The next day Becky ate 2/12 of the pizza for lunch. How much of the pizza was left after she ate her lunch?

• 3/12

• 9/12

• 12/12

• 12/35

Kayla drank 5/8 of a carton of orange juice for breakfast. Tyler drank 1/8 of the carton. How much orange juice was left?

• 5/8 carton

• 3/4 carton

• 1/4 carton

• 7/8 carton

Which expression has the same answer as 3/10 + 2/10 ?

• 2/10 + 8/10

• 1/10 + 4/10

• 6/10 + 4/10

• 1/10 + 3/10

Cara and Marcus shared a candy bar. The models are shared to show the fraction of the candy bar each of them ate. What fraction of the candy bar did Cara and Marcus eat altogether?

Mrs. Ali collected notebook paper from her students at the beginning of the school year. The model is shaded to show the fraction of this notebook paper that Mrs. Ali used in each of the three months. What fraction of the notebook paper Mrs. Ali collected was used during these three months?

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

• common numerator

• common denominator

• equivalent fraction

• mixed number

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

• numerators

• denominators

• mixed numbers

• equivalent fractions

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

• make equivalent fractions

• add again

• simplify

• multiply