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					Metric Stairs
How to do Metric Conversions
 Metric System
•System of measurement.

•Designed to be easy to
use and universal. (built
on powers of ten)

•Correct name is the
“International System of
Units”( or SI for short).
Built on a Root
         Each property of matter
          has a root word that is
          the base measurement
          for that property.

         For example:
              Grams (g) are for mass
              Liters (L) are for volume
              Meters (m) are for
               distance
                   Add a Prefix
 To change the value of the root (make it bigger or smaller),
  you add a prefix

 Smaller
   Milli (m) – 1/1000 of the root (1000 times smaller)
   Centi (c) – 1/100 of the root (100 times smaller)
   Deci (d) – 1/10 of the root (10 times smaller)

 Bigger
   Deka (dk) – 10 times bigger than root
   Hecto (h) – 100 times bigger than root
   Kilo (k) – 1000 times bigger than root.
                         Easy Conversions
                                                          •You can use this simple
kilo-                                                     drawing to convert any
                                                          metric measurement to
        hecto-                                            another metric
                 deka-
                                                          measurement.
                                                          •The stairs have 7 steps
                         root                             going down left to right

                                deci-


                                        centi-


                                                 milli-
                         How does it work?
                                                          •First, identify the prefixes
kilo-                                                     you are being asked to
                                                          convert between.
        hecto-
                                                              •Example: “Convert
                 deka-                                        2.345 cm into
                                                              hectometers”
                         root                                 •cm is centimeters and
                                                              change is to
                                deci-                         hectometers.
                                        centi-


                                                 milli-
                         How does it Work?
                                                          •Next draw out the
kilo-                                                     stairs.
        hecto-                                            •Third, put a mark on
                                                          the starting prefix (centi
                 deka-
                                                          in our example problem)
                         root


                                deci-


                                        centi-


                                                 milli-
                         How does it Work?
            4
                         Left
                                                          •Fourth, “walk”
kilo-
                                                          up/down the stairs to
                   3
                                                          the prefix you are
        hecto-
                           2
                                                          converting to (hecto
                 deka-            1                       in our example)
                         root                             •Count the number of
                                deci-
                                                          steps you traveled
                                                          and note direction as
                                        centi-
                                                          either left or right.
                                                 milli-
              How Does it Work
         Now go to the original number (2.345) and
           move the decimal point the same direction
           and number of “steps” as you did on the
           stairs.
Fill in empty spaces                    Add new prefix
with zeroes


               0.0002345 hm
                    2.345


              4 spaces left
                Practice
 Convert 4.3 km to meters
 Convert 462 cg to hg
 Convert 1 mL to kL

				
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posted:8/20/2012
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