Transcript Convertiendo en la Sistema Metrica

New Prefixes for the Dictionary
Prefix
Meaning
Example
Milli
1/1000
millimeter
Centi
1/100
Centimeter
Deci
1/10
Decimeter
Deka
10x
Dekameter
Heka
100x
Hekameter
Kilo
1000x
Kilometer
Learning Target
• I will collaborate with
my table and class
and learn how to use
the chart to convert
within the metric
system.
Class Challenge
• Everyone scores 3
out of 3 –
• It never has
happened before.
• Doesn’t mean it can’t
happen now!
You need scratch paper today:
• There are 1000 meters in a kilometer.
How many meters are there in 6.62
kilometers?
• There are 1/1000 meters in a millimeter.
How many millimeters are there in 3
kilometers?
Far Side – Sort Of
Announcements:
• 1) Video homework will be
accepted late, but looks bad
on progress report.
• 2) Look for a project over
break! The more you share
with me, the better your
chances.
• 3) Quiz retakes after school
Thursday, 10/17. Meeting
today – can’t do it.
Measuring
What are three things we can
measure?
•
•
•
•
•
•
#1 – Weight (Mass)
We use “grams”
#2 – Volume
We use “liters.”
#3 – Distance
We use “meters.”
Converting within the
Metric System
Its as easy as moving the decimal
point.
The Table is the Key
7
6
5
Kilo Heka Deka
1000x 100x 10x
K
H
Da
4
1x
No
Prefix
3
2
1
Deci Centi Milli
1/10x 1/100
1/
x
1000x
D
C
M
For Example:
• I want to convert 3
KILOMETERS to
MILIMETERS.
• Grab your table and
let’s begin.
Answer the Following:
•
•
•
•
•
Which number is kilo?
Which number is mili?
What is the difference between the two?
7 (kilo) – 1 (mili) = 6
WE WILL MOVE THE DECIMAL 6
PLACES!
• (But, in which direction?)
If we move between Kilo and Mili
on the table…..
•
•
•
•
In which direction are we moving?
Right or left?
RIGHT
We will move the decimal SIX places to
the RIGHT.
Summary
• 3 Kilometers =
• 3000000 milimeters
• A very long road!
The instructions written on
your chart
1) Write down the number for the
first prefix
2) Write down the number for the
second prefix
3) Subtract the two numbers
4) Determine which direction you
move on the table between the
two
Another Problem
I want to convert 3 dl to
3 hl
What is the first
number?
What is the last
number?
What is the difference
between the two?
• 6 – 3 = 3!
• Which
direction?
• Left
Summary:
• 3 deciliters = .003
hekaliters
WARNINGS
• If there is NO PREFIX, this means we are
talking about #4 on the table.
• If there is one letter, that means that we
are talking about #4 on the table.
• One M ALONE stands for Meter – not Mili!
• When moving to the left, if there are no
more numbers, you need to include a zero
for each space you need to move.
Practice Problems
50 meters = ???? Km
2.3 mL = ???? cL
.001 hg = ???? g
Practice problems
• 4) 84 dg = _______ cg
• 5) 100 L = __________ Kl
• 6) 82.34 hm = __________ m
• 7) 16.1 mm = __________ hm
Answers:
• 4) 840 cg
• 5) .1 KL
• 6) 8234 m
• 7) .000161 hm