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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.

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i am 10 times better than the english system of measurement

The Metric System

“I am 10 times better than the English system of measurement.”

the metric system
The 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)
metric prefixes
Metric Prefixes
  • The basic units are METERS, GRAMS, and LITERS
  • The metric system also uses prefix modifiers that are multiples of 10.
meters
Meters
  • Meters measure length or distance
  • A meter is about the width of a doorway
centimeters
Centimeters
  • 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
millimeters
Millimeters
  • 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?
kilometers
Kilometers
  • 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.
slide10
Gram
  • 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.
kilograms
Kilograms
  • 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?
milligrams
Milligrams
  • 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?
liters
Liters
  • 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.

2 Liter Soda

milliliters
Milliliters
  • 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 question
A Thinking Question…
  • How many 2 liter bottles would make up one kiloliter?
slide16

What units would you

use to measure each of

the following items?

changing metric units
Changing 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 a smaller unit you need to multiply

To change from a larger unit to a smaller unit, you need to multiply.

1 km x 1000 = 1000 m

1 m x 100 = 100 cm

1 cm x 10 = 10mm

place values of metric prefixes1
Place Values of Metric Prefixes

Movethe decimal point to the right to multiply.

to change from smaller units to larger units you divide by a power of ten

To change from smaller units to larger units you divide by a power of ten.

1000mm ÷ 10 = 100cm

100cm ÷ 10 = 10dm

10dm ÷ 10 = 1m

place values of metric prefixes3
Place Values of Metric Prefixes

Movethe decimal point to the left to divide.

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