1. The SI System of Measurement.

2. Length = meter Mass = gram Volume = liter Base Units
You can change the size of the measurement simply by adding a prefix to the BASE UNIT.

3. Common SI Prefixes milli = 1/1000 (m + Base Unit)
centi = 1/100 (c + Base Unit)
deci = 1/10 (d + Base Unit)
BASE UNIT (m, l, g)
Deka = 10 (da + Base Unit)
Hecto = 100 (h + Base Unit)
Kilo = 1000 (k + Base Unit)

4. Common SI Prefixes Remember the order of the Prefixes K i l o Ki l o
ing
Hecto
Hec t o
enry
Deca
ied
Deca
BASE
BASE y
deci
dec i
rinking
cen t i
hocolate
centi
mi l l i
ilk
milli

5. ALL SI Prefixes:
These measurements are hard to comprehend. Click the table above to get some help Understanding this Scale of our Universe.

6. How to measure (Length)
10 meters = 1 Decameter
10 x 1m = 10m

7. How to measure (Length)
10 Decameters = 1 Hectometer
10 x 10m = 100m

8. How to measure (Length)
10 Hectometers = 1 Kilometer
10 x 100m = 1,000m
Kilometer

9. How to measure (Length)
Every Space in the SI system is divided into 10 equal parts
1 decimeter is divided into 10 centimeters
1 millimeter is divided into 10 EVEN SPACES
1 centimeter is divided into 10 millimeters

10. How to measure (Length)
Place the decimal point to the right of the unit you are measuring in (usually cm).
Think of every place holder individually as a number 0-9. 1 2 3 4
Measure this object in Centimeters: 3 7 5
__K
__H
__D
__B
__d
__c
__m
__ [ ]

11. How to measure (Length)1 2 3 4
Now measure this object in centimeters: 2 8 7
__K
__H
__D
__B
__d
__c
__m
__ [ ]

12. How to measure (Length)40 41 42 43 44
Now what would this measurement be in meters?
Now measure this object in centimeters: 4 3 8 4
__K
__H
__D
__B
__d
__c
__m
__ [ ]

13. How to measure (Length)89 90 91 92 93
What would this measurement be in kilometers:
Now measure this object in centimeters: 9 1 5
__K
__H
__D
__B
__d
__c
__m
__ [ ]

14. How to convert within the SI system:
Write down the list of common units (Biggest to Smallest) X Km Hm
Dam m dm cm mm
Put an X on the square above that is the current (or Starting) Unit
(Practice problem = convert cm to Hm)
Then Circle the Square above of the measurement you wish to convert it into. 

15. How to convert within the SI system:4 3 2 1 X Km Hm
Dam m dm cm mm
If you are the X and were standing on the cm block
How many steps would it take to walk to Hm? _____________ 4
Which direction did you walk, LEFT or RIGHT?
Now “Walk” your decimal point in the same direction and the same number of spaces as you indicated above. Make sure you LABEL your measurements!
12 78 Hm 4 3 2 1