6th Grade Math Textbook, Fundamentals

Lesson 6-2 for exercise sets. &KDSWHU 

3UDFWLFH   $FWLYLWLHV

Express each as a unit rate.

1.70 min to stock 14 shelves 2.140 mi on 4 gal of gas 3.720 words in 60 lines

4.5 oranges for $1.20 5.$6.00 for 12 lb of spaghetti 6.4 qt of soup for $3.80

Find the better buy.

7.3 pt for $1.08 or 5 pt for $1.95 8.3 cans for $4 or 4 cans for $5.50

9.A 30-ounce jar of salad dressing costs $2.39. A 24-ounce jar costs

$2.14, and a 13-ounce jar costs $1.42. To the nearest cent, what is the

cost per ounce of each size jar? Which is the best buy?

10.Discuss and Write Explain how to find the best buy when the price given

is not the unit cost.

Rates can be written in two ways.

To write the ratio of two measures as a fraction without unit names, both units must

be the same. Change the larger unit of measure to the smaller unit of measure.

Rate Shown Two Ways

Alec counts 225 heartbeats in 3 minutes. minutesbeats^2253 minutesbeats 2253

Mrs. Jones burns 480 calories in 2 hours. calorieshours^4802 calorieshours 4802

Gasoline costs $38 for 10 gallons. gallonsdollars^3810 gallonsdollars^1038

Rhiannon does 25 sit-ups in 30 seconds. secondssit-ups^2530 secondssit-ups^3025

Ratio with Different Units Change to Smaller Unit of Measure Ratio with Same Units

4 nickels to 3 dimes

4 nickels

3 dimes

Change dimes to nickels.

Since 1 dime 2 nickels,

multiply the number of dimes by 2.

3 • 2 6 nickels

So 3 dimes 6 nickels.

4 nickels to 6 nickels

(^46)  (^23) simplest form
2 gallons to 5 quarts
2 gallons
5 quarts
Change gallons to quarts.
Since 1 gallon 4 quarts,
multiply the number of gallons by 4.
2 • 4 8 quarts
So 2 gallons 8 quarts.
8 quarts to 5 quarts
8
5
4 days to 2 weeks
4 days
2 weeks
Change weeks to days.
Since 1 week 7 days,
multiply the number of weeks by 7.
2 • 7 14 days
So 2 weeks 14 days.
4 days to 14 days
144 ^27 simplest form