Unit 3 Math Test Review!

Percents

100

160 is what percentage of 40?

400%

200

What number is 40% of 160?

64

300

There are 15 pieces of fruit in a bowl and 6 of them are apples. What percentage of the pieces of fruit in the bowl are apples?

40%

400

Lin’s family has completed 70% of a trip. They have traveled 35 miles. How far is the trip?

50 miles

500

A store is having a 20%-off sale on all merchandise. If Mai buys one item and saves $13, what was the original price of her purchase? Explain or show your reasoning.

$65

Unit Rates

100

How long would it take to walk to school?

• Walk 3 miles per hour to school, which is 1.5 miles away.

30 minutes

200

How long would it take to get there?

• Take a train going 80 miles per hour from Albany to New York City, which are 160 miles apart.

2 hours

300

How long would it take to get there?

• Drive 54 miles per hour between Buffalo and Seneca Falls, which are 135 miles apart.

2.5 hours

400

Lin runs 5 laps around a track in 6 minutes. How many laps per minute is that?

5/6 (or 0.83) laps per min

500

Lin runs 5 laps around a track in 6 minutes. How many minutes per lap is that?

1 minutes 12 seconds per lap
(1.2 minutes, or 1 1/5 minutes)

Unit Conversions

100

How many centimeters are in 3/4 meter?

75 centimeters

200

How many quarts are in 4.25 gallons? 

17 quarts

300

How many inches are in 2.5 yards?

90 inches

400

Which weighs more: a watermelon that weighs 7.5 kilograms or a baby that weighs 12 pounds?
(Note: 1 pound is about 0.45 kilograms)

The watermelon is heavier (baby weighs about 5.4 kg, watermelon weighs about 16.6 lbs)

500

Is 3.5 cups more or less than 1 liter? Explain or show your reasoning. (Note: 1 cup is approximately 236.6 milliliters.)

Less
3.5 cups is 828.1 mL
there are 1000 mL in 1 L

Random

100

The distance of a doorknob from the floor is about 1 _____________.

The thickness of a fingernail is about 1 _____________.

The length of a piece of printer paper is about 1 _____________.

1 yard or meter
1 millimeter
1 foot

200

An ant travels at a constant rate of 30 inches every 2 minutes.

How many inches per minute does it travel?

How many seconds per inch does it travel?

15 inches per minute

4 seconds per inch

300

A car is traveling at a constant speed. it takes 3 hours for the car to travel 126 miles.

What is the speed of the car?

42 mph

400

On Saturday, Elena read 40% of a 225-page book. That day, Jada read 45% of a 200-page book.

Who read more pages that day?

They both read 90 pages

500

If 𝑥 represents a number, does 2/5 times x always represent 40% of that number? Explain your reasoning.

yes, because 1/5 of a number is the same as 20%, because 20 is 1/5 of 100

Therefore, 2/5 would always be the same as 40%