Envision Math Topic 7 Add and Subtract Fractions

1.) Select ALL of the expressions that are

equal to 3/4

• 7/20 + 2/5 ; I found a common denominator and then added the numerators to get 3/4

• 19/20 - 1/5 ; I found a common denominator and then subtracted the numerators to get 3/4.

• 5/17 - 2/13 ; I added the numerators and denominators to get 3/4.

• 2 + 1 1/3; I found a common denominator and then subtracted the numerators to get 3/4.

• 3 4/7 - 9/10 ; I found a common denominator and then subtracted the numerators to get 3/4

2.) Elizabeth has two ribbons. One is 1/7 foot

long, and the other is 2/5 foot long. Write

1/7 and 2/5 using a common denominator.

What fraction represents the total length of ribbon Elizabeth has? *Use the "/" symbol to write your fraction. Example 2/3.

3.) Tristan had 1/3 pound of grapes at home.

He went to the store and bought 3/8 pound

of grapes. What fraction of a pound of grapes does Tristan have now? *Use the "/" symbol to write your fraction. Example 2/3.

4.) The bar diagram shows the fractional

parts of a room that Andrea and Yeo

painted. Find the total amount of the room that they painted.

5.) For a trip to the beach, Kelly drove for 5/6 hour and 2/5 Joshua drove for hour. How much longer did Kelly drive than Joshua? Find the exact amount.

6.) Laquita had 5 7/9 yards of fabric. She used 3 2/3 to make a blouse. Write and solve an expression to find how much fabric is left.

• 8 13/9

• 2 1/9

• 9 4/9

• 3 2/9

7.) Valentino needs 4 1/2 pounds of chicken

for a recipe. He already has 2 3/4 pounds of chicken. How many more pounds of chicken does Valentino need? Identify which equation represents the problem and solve.

• 3/4 pounds

• 1 1/2 pounds

• 1 3/4 pounds

• 2 3/4 pounds

8.) For an industrial arts class, Talia used 1/3 of a piece of wood for the base of her project, 1/4 of the piece of wood for a vertical support, and the rest for a

horizontal support. What fraction of the piece of wood did Talia use as a horizontal support?

9.) For an Earth Day project, Rushdi collected 7 5/8 pounds of recyclables, Lydia collected 9 2/3 pounds of recyclables, and Latrelle collected 10 3/4 pounds

of recyclables. How many pounds of recyclables did the three friends collect in all?

• 26 3/16 pounds

• 26 1/24 pounds

• 28 3/16 pounds

• 28 1/24 pounds

10.) A carpenter needs a board that is 9 2/3 feet

long. He has a board that is 12 1/4 feet

long. How much of the board must the

carpenter cut off?

• 3 5/12

• 2 7/12

• 21 11/12

• 2 5/12