Transcript METRIC CONVERSION - Schurz High School

Do Now - 9/28/09
Solve:
How many ____
are in ______
m in 1km
mm in 1m
kg in 1g
Where does the
decimal point go?
Before or after the
number?
METRIC CONVERSION
You can do Metric Conversion if:
You can Count Up to Six and Know
Your Left From Your Right
What are Metric Conversions?
 Sometimes we need to
change from one
measurement to another.
 This is usually done because
the unit that is used is either
too big or too small for that
type of measurement.
TOO BIG !!!
525,568
millimeters
Sometimes the number is too big for the unit
being measured.
Too Small
.00654 km
Sometimes the number is too
small for the unit being
measured
How Do We Fix This Problem?
We can correct these problems by doing a
process called Metric Conversion. When
you do a Metric Conversion, you are
changing from one unit of measurement to
another.
The Staircase Method
We will be using a method called The Stairstep Method of Metric Conversion.
It requires two things; one, that you be able to
count to 6, and two, that you know your left
from your right.
Staircase Method (copy this)
KiloHecto-
Grams,
liters,meters
Dekabase units
DeciCentiMilli-
How Do I Use This?
Start: The first letter of the prefix in the unit of
measurement tells you which step to start on.
Stop: The first letter in the second unit of
measurement tells you which step to stop on.
How Do I Use This (cont.)?
+ Find which step to start on, and count the
number of steps it takes to get to the step
that you need to stop on.
+ If you went to the right(downstairs) the
decimal in the first measurement moves that
many places to the right. If you went to the
left (upstairs) then the decimal moves to the
left. Fill any empty places with zeros.
The Stair-step
KiloHecto-
Grams,
liters,meters
Dekabase units
DeciCentiMilli-
525568 mm = ? m
Millimeters are a very small amount of
distance. You would not want to measure a
large distance in a very small unit.
To make the conversion, we start on the millistep and go three steps to the left to get to
the meter step. Therefore, the decimal in
525568. mm moves three places to the left,
becoming 525.568 m.
.00654 km = ? m
Kilometers are a fairly large unit of distance.
You would not want to measure a small
distance in a large unit, so we need to
convert it to a smaller unit, the meter.
We would start on the Kilo- step and move
three steps to the right this time, ending on
the meter (base unit) step. Therefore,
.00654 km becomes 6.54 m.
Hey! This Is Easy!
You bet it’s easy! Like we said on the first
slide…..
Be able to count up to six and know your left
from your right.
Now, get your stair-step sheet and your
practice problems and do some more
conversions!
What is the value for each prefix?
Exit Slip (When you are finished
get out HW)
 Convert:
1. 20kg to grams
2. 10m to km
3. 34cl to ml
4. Write down one question from your HW
that you had trouble with