Problem Solving with Unit Rates

Dave and Eric are painting a long fence. Dave paints 125 feet of the fence in 5 hours. Eric paints 175 feet in 7 hours. Whose rate is faster?

• Dave and Eric paint at the same rate.

• Eric paints faster at 25 feet per hour.

• Dave paints faster at 20 feet per hour.

• Neither Dave or Eric paint faster.

Refer to the double number line:

If you makes 6 loaves of bread, how many cups of raisins did she use?

• 3

• 9

• 12

• 6

The double number line shows that a water park allows 18 people to go down their giant water slide in 3 minutes. How long would it take 12 people to go down the slide?

• 1 minute

• 2 minutes

• 3 minutes

• No way to find out.

Which numbers come next on this double number line?

• Sugar: 12

  Flour: 8

• Sugar: 12

  Flour: 18

• Sugar: 8

  Flour: 12

• Sugar: 12

  Flour: 12

What is the ratio represented in this number line for sugar to flour

• Sugar: Flour

  2 : 3

• Sugar: Flour

  3 : 2

• Four : Sugar 8

  3 : 2

• I have no idea!

• 1 pound

How long would it take 12 people to go down the slide?

• 1 min

• 2 min

• 3 min

• undeterminable

Turn to the page that you find Unit Rates. Find the Explore Activity and fill in the blank. “Jeff hikes ____ mile every 15 minutes or ¼ hour.”

• 1/3

• 1/2

• 1/4

• 1/6

Which option is the better deal? Doritos $4.39 for 11.5 oz or Cheetos $3.24 for 9.75 oz (HINT: Set up a unit rate)

• Doritos

• Cheetos

• They are equal to each other

What is the unit rate for driving 20 feet per 2 seconds

• 10/1 (10 feet per 1 second)

• 20/1 (20 feet per 1 second)

• 30/3 (30 feet per 3 seconds)