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

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## PowerPoint Slideshow about ' “I am 10 times better than the English system of measurement.”' - alfonso-gilbert

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

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

“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.
- 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

- The basic units are METERS, GRAMS, and LITERS
- The metric system also uses prefix modifiers that are multiples of 10.

Meters

- Meters measure length or distance
- A meter is about the width of a doorway

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

- 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

- 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.

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

- 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

- 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 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

- 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…

- How many 2 liter bottles would make up one kiloliter?

Which unit would you use to measure the length of this bicycle?

km m cm mm

Which unit would you use to measure the volume of water in an aquarium?

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 measure the mass of a whole watermelon?

kg g cL mg

Which unit would you use to measure the volume of this 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 length of a bracelet?

km m cm mm

Changing Metric Units

- To change from one unit to another in the metric system you simply multiply or divide by a power of 10.

1 km x 1000 = 1000 m

1 m x 100 = 100 cm

1 cm x 10 = 10mm

Place Values of Metric Prefixes

Movethe decimal point to the right to multiply.

1000mm ÷ 10 = 100cm

100cm ÷ 10 = 10dm

10dm ÷ 10 = 1m

Place Values of Metric Prefixes

Movethe decimal point to the left to divide.

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