Vocabulary
A comparison of two quantities by division
Ratio
Find two ratios that are equivalent to 6/14
possible answers: 3/7, 12/28
Estimate the unit rate: 4008 Calories for 8 servings of pot pie
about 500 calories per serving
Estimate the unit price: $107 for 22 magazines
Approximately $5 per magazine
How many grams in 1 kilogram?
1000
Ratios that express the same relationship
Equivalent Ratios
Are these ratios equivalent: 8/16 and 5/32
No
Estimate the unit rate: $2.19 for 1/2 pound
about $4 per lb.
Find unit price: 12 slices of pizza costs $9.00
$0.75/ slice
I have a container that holds 5 liters. How many milliliters does it hold?
5000
A ratio that compares tow quantities measured in different units
Rate
Are these ratios equivalent: 45/75 and 3/5
Yes
Find Unit Rate: $7.05 for 3 tacos
$2.35 per taco
Estimate the unit price: A 16 oz. package of brown rice costs $0.79 and a 32 oz. package of brown rice costs $3.49. Which is the better buy?
16 oz package
How many feet are in 7 yards?
21 feet
Rate in which the second quantity in the comparison is one unit
Unit Rate
At the pet store, there are cats, dogs, and bunnies. The ratio of cats to bunnies is 4 to 5. If there are 60 animals total and there are 25 bunnies, how many cats are dogs are there?
15
Copper weighing 4480 kilograms has a volume of 0.5 cubic meters. What is the density of copper?
8960 kg/m^3
Find the unit price: 2/3 pound of walnuts for $2.50 or ½ pound of walnuts for $2.25. Which is better buy?
$3.75/lb, $4.00/lb (2/3lb)
Dean has 22 quarts of punch. How many gallons of punch does he have?
5 1/2 gallons
A fraction whose numerator and denominator represent the same quantity but use different units
Conversion Factor
Dog medication instructions: 0.5 tsp per 5 lb., Jaime has a 60 lb. dog who she plans to give 12 tsp. of medicine. Is this dose correct?
No, should be 6 tsp.
A clothing store charges $25 for 4 T-shirts. A student says that the unit price is $0.16 per shirt. What is the error? What is the correct unit price?
The student divided the number of shirts by the cost instead of the cost by the number of shirts; $6.25 per T-shirt
Better buy?: 16oz bottle of soda for $1.25 or 20oz bottle of soda for $1.65
20 oz. for $1.55
I bought 3 gallons of milk. How many cups of milk did I buy?
48 cups