1. Metric Conversions

2. Why use conversions?
Need to convert from one measurement to a more “______________” measurement
Usually original number is too BIG or too small
534,983 mm km

3. How to use conversions…
Brainstorm 3 things you could measure with the following units
Meters
Liters
Grams

4. Stair Step Kilo- Hecto- Deka- base units Deci- Centi- Milli-
Grams, liters,meters

5. Converting: 534,983 mm = ? m
Starting on the mm step, its 3 steps to m (basic unit)
Move the decimal 3 places to the left
534,983

6. Converting: 0.000098 km = ? m 0.000098 What about… 98 km m
How many steps is it from km → m?
Which way do you move?
What about…
98 km m

7. Metric Conversions Grams, liters,meters
Kilo-
Hecto-
Deka-
base units
Deci-
Centi-
Milli-
Grams, liters,meters
Each move to the right = multiplying by 10
Each move to the left =
dividing by 10

8. Examples of scientific notation
Scientific Notations
Short hand way writing _____________ or extremely small numbers
Examples of scientific notation
3.8 x 108
9.1 x 103
6.7 x 10-6

9. Scientific Notations
The little number means _______________ times to move the decimal point
The +/- sign indicates the _______________ to move the decimal point (left or right)
3.8 x 108 = 380,000,000
Try these
9.1 x =
6.7 x =

10. Multiplying and Dividing w/Scientific Notation
_____________ = add exponents
_____________ = subtract exponents
(2.0 x 109) x (4.0 x 103) = ????

11. Scientific Notation Practice
Write out 4.8 x 10-5
Which is bigger? (9.9 x 103) or (2.4 x 107)
Write in scientific notation 6,300,000,000
Write in scientific notation
Divide (5.0 x 106) by (2.0 x 102)
Most excellent!!