Vocabulary
A comparison between two numbers, using division.
Ratio
Express the following ratio in 3 ways:
Mrs. Peterson bought 4 apples and 8 oranges at the grocery store.
4 A : 8 O
4 apples to 8 oranges
4 A / 8 O
Proportional or not?
2/14 = ? = 1/8
Not proportional
Rate or not a rate?
2 : 3
Not a rate
Convert using dimensional analysis:
180 inches to feet.
(1 foot = 12 inches)
15 feet
A comparison between two numbers with DIFFERENT, units.
Rate
Find a ratio equivalent to 15/20.
Proportional or not?
6/14 =?= 9/21
Proportional
Rate or not a rate?
60 seconds : 1 minute
Not a rate
Convert 16 gallons to quarts.
(4 quarts = 1 gallon)
64 quarts.
A comparison between two numbers, using division, with different units, that also has a denominator of 1.
Unit Rate
Draw a picture showing a ratio of 2:5.
Answers will vary.
Solve the proportion.
x / 20 = 60 / 100
x = 12
Find the unit rate.
Tamara purchased 3 new shirts for $52.68.
$17.56 per shirt
Convert 7.5 minutes to seconds.
(60 seconds = 1 minute)
450 seconds
An equation stating that two ratios are equal
Proportion
Simplify the following ratio.
13:169
1:13
Solve the proportion.
5/9 = 45/y
y = 81
Find the unit rate.
Ms. Schilly ran 13 miles in 104 minutes.
8 minutes per mile
Covert 8 kg to ounces.
(1 kg = 2.2 lb, 1 lb = 16 oz)
281.6 ounces
To convert from one monetary system to another, you need to know the _______________ rate
Exchange
What is the ratio of boys to girls in class today?
Reduce if possible.
answer will vary
Solve the proportion.
16 / 196 = x / 49
x = 4
Choose the better deal.
Mr. Moloney's car can travel 52 miles on 2 gallons of gas. Mr. Selzer's car can travel 69 miles on 3 gallons of gas. Which car has better gas mileage? How do you know?
Mr. Moloney's car has better gas mileage.
Convert 72,000 seconds to days.
(60 seconds = 1 minute; 60 minutes = 1 hour;
24 hours = 1 day)
10 days