Models for Adding and Subtracting Fractions

Eric needs 1/2 deck of cards for a magic trick.He only has 2/7 of a deck.What fraction of a deck does Eric still need?

• Eric still needs 1/5 of a deck.

• Eric still needs 11/14 of a deck.

• Eric still needs 3/14 of a deck.

• Eric still needs 3/9 of a deck.

Randy ran 1 3/4 miles.Natasha ran 9/10 miles. How many more miles did Randy run than Natasha?

• Randy ran 17/20 miles more than Natasha.

• Randy ran 3/20 miles more than Natasha.

• Randy ran 12/14 miles more than Natasha.

• Randy ran 12/20 miles more than Natasha.

It takes Lacy 8 1/3 sec to climb up the slide & 2 1/4 sec to go down. How many sec is Lacy's trip up & down the slide?

• Lacy's trip is 10 7/12 seconds long.

• Lacy's trip is 6 1/12 seconds long.

• Lacy's trip is 10 2/7 seconds long.

• Lacy's trip is 11 seconds long.

Robert's gas tank has 5 3/5 gallons of gas in it. If he adds 7 2/3 gallons, how much gas will be in the tank?

• There will be 13 4/15 gallons of gas in the tank.

• There will be 2 1/15 gallons of gas in the tank.

• There will be 12 5/8 gallons of gas in the tank.

• There will be 2 1/2 gallons of gas in the tank.

Vanna used the fraction strips shown to help her determine the difference between 5/6 and 1/4. What is 5/6-1/4?

• 1/5

• 7/12

• 1/2

• 5/8

The shaded part of the model below represents a fraction. The model represents another fraction being subtracted from the shaded fraction. Which expression does this model represent?

• 7/12 - 1/12

• 8/9 - 7/9

• 2/3 - 7/12

• 8/12 - 5/12

Three sisters write a part of a short story. The first sister writes 1/3 of the story, the second sister writes 1/6 of the story, and the last sister writes 1/12 of the story. How much of the story have the sisters completed so far?

• 3/12

• 1/2

• 7/12

• 2/3

Marlon watched a movie 1 8/9 hours long. Jessie watched a movie 2 2/7 hours long. How much longer was Jessie's movie than Marlon?

2 1/2 - 1 4/11

5 3/8 -2 7/8