Unit Rate
Better Buy
Speed/Average Speed
Grab Bag
100
If Mimi drives 50 miles in 2 hours, what is her speed in miles per hour (unit rate)?
25 miles per hour
100
TRIPLE POINTS!!!
Which is the better deal $20 for 5 t-shirts or $24 for 8 t-shirts?
5 for $20 = $4 per shirt
8 for $24 = $3 per shirt
So 8 shirts for $24
100
Copy and Complete the table that compares
the Test scores with A’s to those with B’s:
100
There are 5 dogs, 7 cats and 3 birds.
What is the ratio of cats to total animals?
Write the ratio in 3 ways
7 to 15 7:15 7/15
200
If James types 120 words per 3 minutes, what is his unit rate in words per minute?
40 wpm
200
Which is the better buy: one slice of pizza for $3.75 or 8 slices of pizza for $18. Be ready to support your answer with numbers!
8 slices ($2.25 per slice)
200
DAILY DOUBLE!
In the class there are 4 students wearing Adidas for every 5 students wearing Nikes. If you counted
20 students wearing Nikes, how many students are wearing Adidas?
16 students wearing Adidas
200
The ratio of boys to girls in the class is 10/8
Which of the following ratios are equal to the ratio above? (Show work to prove your answer)
A) 5/4
B) 30/25
C) 45/36
10/8 = 5/4
a) 5/4
C) 45/36 = 5/4
300
What is a unit rate?
A unit rate compares the amount of something (oranges, elephants, etc.) to 1 of the other thing in the problem (apples, mice, etc.)
300
DAILY DOUBLE!!!
Which is the better buy: 8 mints for $1.84 or 14 mints for $3?
8 mints = $0.23 per mint
14 mints = $0.21 per mint
So 14 mints
300
Susan jogged 27 meters in 9 seconds. What is her rate per second?
3 meters per second
300
What is the difference between a ratio and a rate?
ratio: same units in numerator and denominator
rate: different units in numerator and denominator
(In life, people tend to use them interchangeably.)
400
A lion can eat 4 1/2 lbs of meat in 3 minutes. At that rate how much meat can it eat per minute.
9/2 divided by 3
=3/2 or 1 1/2 lbs of meat per minute.
400
Which is the best buy: 14 cans for $4.48 at Walmart, 6 cans for $1.74 at Winco, or 15 cans for $4.65 at Target?
6 cans at Winco because each can is 0.29
Walmart 0.32, Target 0.31
400
Jada walked 15 miles in 4 hours. What is her walking rate per hour?
3.75 miles per hour (or 3 3/4 miles per hour).
400
Kayla knits 3/5 of a meter in 1/3 of an hour. What is her knitting unit rate?
1 4/5 m/hour
500
Makayla can eat 3 3/4 pizzas in 5/6 of an hour. At that rate, how much pizza can she eat per hour?
3 3/4 divided by 5/6
equals 90/20 = 9/2 = 4 1/2 pizzas per hour.
500
Contractor Bob tells Mr. Allen the cost of refinishing his basement is $103,049. Mr. Allen's basement is 1800 square feet. Contractor Jim says he can do the job, just without the bathroom, for $102,268. The bathrooms is 150 sq. feet. If it's ok not to finish the bathroom which contractor has the best rate per square foot?
Bob $57 per sq ft
(Jim $62 per sq ft)
500
Extra 200 points!!!
Robert drove his truck 250 m uphill in 25s. He drove back down the hill in 10 s. What is the difference between his average speed going up and coming down?
15 m/s (10 m/s going up, 25 m/s going down. If you said that the difference is -15 m/s, that's fine!)
500
A parking garage charges $7 for the first three hours. Every subsequent half hour (or part thereof) costs $2.50. If Dr. Lewis parks from 3:15 pm -8:20 pm, how much will she owe the parking garage?
3:15 to 8:20 is 5 hrs and 5 minutes
$7 + $2.50(5)
$7 + $12.50
$19.5