“i am 10 times better than the english system of measurement.”
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The Metric System. “I am 10 times better than the English system of measurement.”. The Metric System. The metric system is a measurement system based on our decimal (base 10) number system, making it very easy to use. - PowerPoint PPT PresentationTRANSCRIPT
“I am 10 times better than the English system of
measurement.”
The Metric SystemThe Metric System• The metric system is a measurement system
based on our decimal (base 10) number system, making it very easy to use.
• Most other countries and all scientists and engineers use the metric system for measurement. (This is why the metric system is also called “THE SYSTEM INTERNATIONALE”)
• Basic units:• METER (length)• GRAM (mass)• LITER (volume)
Countries who use the Countries who use the Metric System Metric System (gray)(gray)
Liberia
Burma
Metric PrefixesMetric Prefixes
• The basic units are METERS, GRAMS, and LITERS• The metric system also uses prefix modifiers
that are multiples of 10.
Prefix Symbol Factor Number Factor Word
Kilo- k 1000 Thousand
Hecto- h 100 Hundred
Deca- da or dk 10 Ten
Unit m, l, or g 1 One
Deci- d .1 Tenth
Centi- c .01 Hundredth
Milli- m .001 thousandth
Place Values of Metric Place Values of Metric PrefixesPrefixes
Thousand
Hundred
Ten
One
Tenth
Hundredth
Thousandth
KILO
km1,000 meters
HECTO
hm100
meters
DEKA
dkm10 meters
m deci
dm
1/10th
Of a meter
centi
cm1/100th
Of a meter
milli
mm1/1000th
Of a meter
MetersMeters• Meters measure length or distance• A meter is about the width of a doorway
CentimetersCentimeters• The value of the
prefix “centi” is 1/100th
• How many centimeters
are in 1 meter?
• One centimeter is about the width of a large paper clip
•or the width of your pinky fingernail
MillimetersMillimeters
• The value of the prefix “milli” is 1/1000th
• One millimeter is about the thickness of a dime.
• How many millimeters are in one meter?
KilometersKilometers• The value of the prefix “kilo” is 1,000
• How many meters are in one kilometer?
• 1.6 kilometers is about 1 mile• A kilometer is about six city blocks or
10 football fields.
GramGram• Grams are used
to measure the mass of an object.
• Mass is similar to weight
• 1 gram is the mass of a small paper clip.
KilogramsKilograms
•The value of the prefix “kilo” is 1,000
•1 kilogram weighs about as much as 6 apples or 2 pounds.
•How many grams are in one kilogram?
MilligramsMilligrams• The value of the
prefix “milli” is 1/1000th
• A milligram weighs about as much as a grain of salt.
• How many milligrams are in one gram?
LitersLiters• Liters are used to
measure the amount of space (volume) that a liquid occupies.
• 1 liter is half of a 2 liter bottle of Coke or other soda.
• A liter is a little bit larger than a quart.
MillilitersMilliliters• 1 milliliter is
about the amount of one eyedropper full of liquid.
• The value of the prefix “milli” is 1/1000th
• How many milliliters are in one liter?
A Thinking A Thinking Question…Question…• How many 2
liter bottles would make up one kiloliter?
Which unit would you use to Which unit would you use to
measure the length of this measure the length of this
bicycle?bicycle?
km m cm mm
Which unit would you use to Which unit would you use to
measure the mass of a penny?measure the mass of a penny?
km g cL mg
Which unit would you use to Which unit would you use to
measure the volume of water measure the volume of water
in an aquarium?in an aquarium?
L m cL mg
Which unit would you use to Which unit would you use to
measure the mass of a measure the mass of a
feather?feather?
L m cL mg
Which unit would you use to measure the mass of a student desk?
kg g cL mg
Which unit would you use to Which unit would you use to
measure the mass of a whole measure the mass of a whole
watermelon?watermelon?
kg g cL mg
Which unit would you use to Which unit would you use to
measure the mass of an egg?measure the mass of an egg?
kg g mm mg
Which unit would you use to measure the volume of a can of soup?
kL L mm mL
Which unit would you use to Which unit would you use to
measure the volume of this measure the volume of this
glass of milk?glass of milk?
kL L cL mL
Which unit would you use to measure the distance across Kansas?
km m cm mL
Which unit would you use to measure the height of a tree?
km m cm mm
Which unit would you use to measure the length of a bracelet?
km m cm mm
Changing Metric UnitsChanging Metric Units
• To change from one unit to another in the metric system you simply multiply or divide by a power of 10.
To change from a larger unit To change from a larger unit to a smaller unit, you need to to a smaller unit, you need to
multiply.multiply.1 km x 1000 = 1000 m
1 m x 100 = 100 cm1 cm x 10 = 10mm
Place Values of Metric Place Values of Metric PrefixesPrefixes
Thousand
Hundred
Ten
One
Tenth
Hundredth
Thousandt
h
km
kL
kg
hm
hL
hg
dkm
dkL
dkg
m
L
g
dm
dL
dg
cm
cL
cg
mm
mL
mg
Move the decimal point to the right to multiply.
Place Values of Metric Place Values of Metric PrefixesPrefixes
Thousand
Hundred
Ten
One
Tenth
Hundredth
Thousandth
km
kg
kL
hm
hg
hL
dkm
dkg
dkL
m
g
L
dm
dg
dL
cm
cg
cL
mm
mg
mL
To change To change from smaller from smaller
units to larger units to larger units you units you
divide by a divide by a power of ten.power of ten.
1000mm ÷ 10 = 100cm100cm ÷ 10 = 10dm
10dm ÷ 10 = 1m
Place Values of Metric Place Values of Metric PrefixesPrefixes
Thousand
Hundred
Ten
One
Tenth
Hundredth
Thousandt
h
km
kL
kg
hm
hL
hg
dkm
dkL
dkg
m
L
g
dm
dL
dg
cm
cL
cg
mm
mL
mg
Move the decimal point to the left to divide.
Place Values of Metric Place Values of Metric PrefixesPrefixes
km
kg
kL
hm
hg
hL
dkm
dkg
dkL
m
g
L
dm
dg
dL
cm
cg
cL
mm
mg
mL
3km 30hm 300dkm 3000m
4L
30000dm 300000cm
12cm
3000000mm
Sorry!Sorry!• That is not the BEST choice!
