1. Unit Conversions We need to be able to convert from one unit to another The method that we will use is called the factor label method (FLM) or dimensional analysis

2. UC cont. Let the units do the work for you by knowing the connections between units 12 donuts in a dozen 100 cm in a meter 5280 feet in 1 mile

3. Unit Factors This fraction is called a unit factor 12 Donuts 1 dozen

4. Hints We use two math facts with the FLM Any number divided by 1 equals itself Any number times one equals itself

5. Sample Problem How many donuts are in 3.5 dozen? Start with what you know Align the unit factor so that units will cancel out

6. More Samples How many feet in 12.3 miles? How many inches in one yard? How many in ounces 45 kg?