Unit Conversion
There are 3,785 milliliters in 1 gallon, how many milliliters are in 4 gallons?
15,140 milliliters
Mai and Priya were on scooters. Mai traveled 15 meters in 6 seconds. Priya travels 22 meters in 10 seconds. Who was moving faster?
Mai’s scooter is faster.
Mai: 15 divided by 6 = 2.5
Priya: 22 divided by 10 = 2.2
Mai travels 0.3 meters further in 1 second.
A copy machine can print 480 copies every 4 minutes. How many copies can it print in 10 minutes?
1,200 copies in 10 minutes
480 copies = 4 minutes
120 copies = 1 minute
1,200 copies = 10 minutes
The value of 8 dimes is ______% of the value of a dollar.
80%
1 dime = 10% of a dollar
8 multiplied by 10% = 80%
Last Sunday 1,575 people visited the amusement park. 56% of the visitors were adults. How many adults visited the park?
882 adults visited the park
56% of 1,575= (787.5 + 78.75 + 15.75) = 882
OR
0.56 multiplied by 1,575
OR
56/100 multiplied by 1,575
When this pet hamster is placed on a digital scale, the scale reads 1.5. What could be the units?
Ounces.
(Grams and milligrams are too small. Pounds and kilograms are too big.)
Andre types 208 words in 4 minutes. Noah types 342 words in 6 minutes. Who types faster?
Noah types faster.
He can type 5 more words per minute than Andre.
Andre: 208 divided by 4 =52
Noah: 342 divided by 6 = 57
A restaurant sells 10 tacos for $8.49, or 6 of the same kind of taco for $5.40.
Which is the better deal?
The 10-taco offer is a better deal.
$8.49 divided by 10 = $0.849
$5.40 divided by 6 = 0.90
The 10 taco deal costs about 0.05 cents less per taco.
How long is 75% of 60 minutes?
45 minutes because it is 3/4 of an hour
(1/4 of an hour is 15 minutes)
To find 40% of 75, Priya calculates 2/5 multiplied by 75.
Does her calculation give the correct value for 40% of 75?
Yes.
40% = 2/5
2/5 multiplied by 75 = 150/5 = 30
Could also be solved finding 0.4 multiplied by 75
Yuki bought a pound of confetti for $12.00. What is the price, in dollars, per ounce of confetti?
There are 16 ounces in 1 pound.
$0.75
12/16 = 3/4 = 0.75
Daniela scored 101 points in 5 basketball games. Casey scored 154 points in 8 games. Hope scored 227 points in 12 games. Who had the most points per game.
Daniela had the most pts. per game
Daniela: 101 divided by 5= 20.2 pts. per game
Casey: 154 divided by 8= 19.25 pts. per game
Hope: 227 divided by 12= 18. 91 pts. per game
There are three car sales people at the local car dealership.
Ronaldo sold 104 cars in 2 years.
Maria sold 322 cars in 7 years.
Bruno sold 516 cars in 12 years.
Who has sold the most cars per year?
Ronaldo has sold the most cars per year.
Ronaldo: 104 divided by 2 = 52 cars per year
Maria: 322 divided by 7 = 46 cars per year
Bruno: 516 divided by 12 = 43 cars per year
A 16-ounce bottle of orange juice says it contains 200 milligrams of vitamin C, which is 250% of the daily recommended allowance of vitamin C for adults. What is 100% of the daily recommended allowance of vitamin C for adults?
80 mg for 100% daily allowance
200 mg = 250%
200 mg divided by 5 = 40 mg
250% divided by 5 = 50%
40 mg = 50%
80 mg = 100%
Order these three values from least to greatest.
65% of 80
82% of 50
170% of 30
52, 51, 41
65% of 80 = (40+ 8 + 4) =52
82% of 50 = (37.5 +2.5 +1)= 41
170% of 30 = (30+ 15 +6) =51
Tyler’s height is 57 inches. What could be his height in centimeters?
A. 22.4
B. 57
C. 144.8
D. 3,551
C. 144.8 centimeters
There are about 2.5 centimeters in every inch.
Two planes travel at a constant speed. Plane A travels 2,800 miles in 5 hours. Plane B travels 3,885 miles in 7 hours. Which plane is faster?
Plane A is faster.
Plane A: 2,800 divided by 5 =560 miles
Plane B: 3,885 divided by 7 = 555 miles
Plane A travels 5 miles further in 1 hour.
Andre sometimes mows lawns on the weekend to make extra money. Two weeks ago, he mowed a neighbor’s lawn for 1/2 hour and earned $10. Last week, he mowed his uncle’s lawn for 3/2 hours and earned $30. This week, he mowed the lawn of a community center for 2 hours and earned $30.
Which jobs paid better than others?
The first two jobs pay better.
Andre worked from 4/2 hours and was only paid $30.00. If he was paid at the same rate as the days before, he should have gotten $40.00
Diego has 75% of $10. Noah has 25% of $30. Diego thinks he has more money than Noah, but Noah thinks they have an equal amount of money. Who is right? How much money do they have?
Noah is right. They each have $7.50
Diego: 75% of $10.00 = $7.50
Noah: 25% of $30.00= $7.50
(50% of $30.00 is $15.00)
A bathtub can hold 80 gallons of water. The faucet flows at a rate of 4 gallons per minute. What percentage of the tub will be filled after 6 minutes?
30%, because the tub will hold 24 gallons after 6 minutes, and 24 is 30% of 80.
4 times 6 = 24 gallons
80 gallons = 100%
8 gallons = 10%
8 times 3 = 24, 10% times 3 = 30%
24 gallons = 30%
A large bucket holds 5 gallons of water, which is about the same as 19 liters of water.
A small bucket holds 2 gallons of water. About how many liters does it hold?
38/5 (or 7.6 or equivalent)
A box of cereal weighs 600 grams. How much is this weight in pounds? (Note: 1 kilogram = 2.2 pounds)
1.32 pounds
1,000 grams = 2.2 pounds
500 grams = 1.1 pounds
100 grams = 0.22 pounds
Therefore, 600 grams = 1.32 pounds
Select all of the trips that would take 2 hours.
A. Drive 60 miles per hour between Buffalo and Seneca Falls, which are 120 miles apart.
B. Walk 3 miles per hour to school, which is 1.5 miles away.
C. Take a train going 80 miles per hour from Albany to New York City, which are 160 miles apart.
Trips A and C take 2 hours.
A. 120 miles divided by 60 miles/hour = 2 hours
B. 1.5 miles divided by 3 miles/hour = 0.5 of an hour (30 minutes)
C. 160 miles divided by 80 miles/hour = 2 hours
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?
$65.00
20% = $13.00
20% multiplied by 5 = 100%
$13.00 multiplied by 5 = $65.00
100% = $65.00
There are 25 students in Ms. Nguyen's second-grade class. In the class election, 4 students voted for Benjamin, 12 voted for Sahil, and 9 voted for Maria.
What percentage of the class voted for each student?
Benjamin= 16%, Sahil= 48%, Maria= 36%
(Check: 16% + 48%+ 36%= 100%)
Benjamin= 4/25 times 100 = 16%
25 students = 100%
1 student = 4%
4 students = 16%
Sahil: 12/25 times 100 = 48%
25 students = 100%
2.5 students = 10%
10 students = 40%
1 student = 4%
12 students = 48%
Maria= 9/25 times 100= 36%
25 students = 100%
5 students = 20%
1 student = 4%
9 students = 36% (20% +16%)