1. Dimensional Analysis

2. Every measurement must have a unit
Without units nothing makes sense
If I said I was 12 tall. What would that mean to you?

3. Sometimes when working with numbers with different units, you have to convert so the units are the same.
We use dimensional analysis. (aka factor label method)
Essentially you multiply by a fraction that is equal to 1
The value of the number is not changed…only the units

4. The numerator and the denominator of the fraction must be equal.
6ft =______ in

5. 1in= 2.54cm 5280ft= 1mi
13.5in =_______cm
8,241ft =______ mi

6. 1in= 2.54cm 5280ft= 1mi 1yard= 3ft
Sometimes it takes more than one factor to get to the correct unit.
300yards = ________mi
2.1mi =______cm

7. Sometimes you have compound units and both must change.
Arrange the factor so that what you want to get rid of will cancel out.
12 mi/hr =_______ mi/min
360ft/s =______mi/hr

8. It doesn’t even matter if you understand what the units mean
1 gluk = 2.5zip blag= 7mulk zip = 5 mulk
23gluk =_____ blag
15blag/hr=_______zip/min