1. Aim: How to Convert from One unit to Another

2. What is a Unit Conversion?  A unit conversion is a changing of one unit to another.  Unit Examples:  meters  grams  inches  feet  pounds  seconds

3. What is a Metric Unit?  Metric units are the universally excepted units around the world (except for the US). They are the easiest to convert.  Metric Unit Examples:  meters  liters  grams Base Units – all other metric units are based off of these (km, cm, ml, kg)

4. Common Metric Units (Prefixes)  Mega-M  kilo- k  hecto-h  deka-da or D  Base-m, l, g  deci- d  centi-c  milli-m  micro-µ  nano-n Abbreviation

5. Metric Conversion Factors  1 km= 1000 m  100 cm= 1 m  1000 mm = 1 m  10 mm = 1 cm Knowing these conversion factors makes calculating conversions easy! These also work for liters and grams. Just replace the base unit (m) with a (g) or (l).

6. Unit Conversion

7. Conversion Factor

8. How many cm are in 1.32 meters? applicable conversion factors: equality: or X cm = 1.32 m= 1 m = 100 cm ______1 m 100 cm We use the idea of unit cancellation to decide upon which one of the two conversion factors we choose. ______ 1 m 100 cm () ______ 1 m 100 cm 132 cm (or 0.01 m = 1 cm)

9. How many meters is 8.72 cm? applicable conversion factors: equality: or X m = 8.72 cm= 1 m = 100 cm ______1 m 100 cm Again, the units must cancel. ______ 1 m 100 cm () ______ 0.0872 m 1 m 100 cm

10. How many feet is 39.37 inches? applicable conversion factors: equality: or X ft = 39.37 in= 1 ft = 12 in ______1 ft 12 in Again, the units must cancel. () ____ 3.28 ft 1 ft 12 in ______ 1 ft 12 in