1. Proportions and Measurements
Objective: Being able to convert from one unit of measure to another, using unit rates

2. Basic units of Measure
12 inches = 1 foot 1cm = 10 mm 3 feet = 1 yard 1 meter = 100 cm 5280 feet = 1 mile 1 kilometer =1000 m 1 inch = 2.54 cm 1 min = 60 sec 1 hour = 60 min 1 day = 24 hours Unit Rate – compared to 1 All the above measurements conversions can be written as a ratio compared to 1 which would be a unit rate

3. Converting Units
Convert from one unit to another Set up the ratio given and multiple by the unit rates until you get the unit you want The key for setting up the ratios is the same units should be on the opposite side of the fraction bar to be able to cancel out

4. Example How many yards are in 3 miles?
Notice the units are opposite each other so they cancel out
Then multiple across the top and bottom and then simplify

5. Examples
Set up and convert the following units How many meters are in 1 mile? How many inches are in a meter? How many minutes and in 1 day?

6. Examples
Know how to combine 2 conversions. A radio controlled car traveled 30 feet across a room in 1.6 seconds, How fast was it going in miles per hour? Converting feet to miles and seconds to hours

7. Examples
Using proportions and the unit rate to calculate higher comparisons. If I can get 55 miles to a gallon of gas, how many miles can I get on a full 10 gallon tank.

8. Examples

9. Exit Ticket
Objective: Being able to convert from one unit of measure to another, using unit rates On a scale of 1 to 4 do you feel we met our objective? If we didn’t what do we need to improve.

10. Homework
Pg , 10