1. Aim: How can we convert units?
Do Now:
Calculate the following with the correct number of significant figures:
(2.53 x 106) (6 x 104)
5 x 10-2
Answer: 3 x 1012

2. Conversions Convert 5.2 cm to m Know your conversion factor
1 cm = 1/100 m or
1 m = 100 cm
Hint: The larger number gets paired with the smaller unit
2. Write out your given and follow it with times and a fraction bar
5.2 cm x ______________________

3. 3. Place your conversion factor into the fraction bar in such a way that you cancel out the original unit
5.2 cm x 1/100 m or cm x 1 m
1 cm cm
4. Solve
0.052 m

4. Multiple Step Conversions
A method of converting from one prefix to another
Convert 5.30 km to mm
5.3 km x m
1 km
= 5.3 x 106 mm
x 1000 mm
1 m

5. Problems Convert: 10.2 mm to m 342 g to kg 0.0102 m 5000 m to km
5.2 kg to g
10,500 cm to m
10 m to km
250 mL to L
2 km to cm
10 kg to μg
5 kg to mg m
0.342 kg
5 km
5,200 g
105 m
0.01 km
0.25 L
200,000 cm
10,000,000,000 μg
5,000,000 mg

6. Pages for Additional Reading
Page 20 (again)