1 / 11

Using Ratios to Convert

Using Ratios to Convert . Quick!!! . Quick! Tell me how many seconds are in a year!!!!. Converting . The best way to understand the rules for converting is to see them in action.   Let's start with an example problem and go through the rules as we solve the problem.  

collin
Download Presentation

Using Ratios to Convert

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Using Ratios to Convert

  2. Quick!!! • Quick! Tell me how many seconds are in a year!!!!

  3. Converting • The best way to understand the rules for converting is to see them in action.   • Let's start with an example problem and go through the rules as we solve the problem.   • You will want to have a pencil, a calculator, and a piece of paper ready to go.

  4. Example • A roll of Christmas wrapping paper contains 2.5 meters of paper. What is the length of the paper in yards? • Step 1: Write down the known values and the unknown values. • Step 2: Find the conversion factor that gives a ratio between meters and yards. 

  5. Step 3:   Write the conversion factor as a fraction with the unit you want to convert to on top and set the problem up as an equation. • 2.5 meters x  1.09yards =                            1 meter 2.725 yards • You can see that the unit meters will cancel.

  6. Example #2 • Convert 325 millimeters to meters. • Step 1: Write down the known values and the unknown values. • Find the conversion factor that gives a ratio between meters and millimeters.   • 1 meter = 1000 mm

  7. Step 3: Write the conversion factor as a fraction with the unit you want to convert to on top and set the problem up as an equation. • 325mm = 1 meter =                 1000 mm .325 meters • The unit millimeterswill cancel.

  8. Example #3 • How many centuries are in 237,439 days? • Step 1:  • Step 2:

  9. Step #3 • Equation: • 237,439 days x 1year  x  1century = 365 days 100 years 237,439   =   36500 • 6.51 centuries • The units days andyearswill cancel.

  10. Remember • Always remember to put the unit that you want to convert to on top! • All conversion factors must be labeled! (meter, liter, year, etc.)

  11. Practice • How many seconds are in 768 days? • A car has traveled 7.2 miles.  How many inches did the car travel?

More Related