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**Answer these questions about the English system:**

Why metrics? Answer these questions about the English system: How many fluid ounces are there in one gallon? How many cups are in a quart? How many inches are in a mile? How many teaspoons are there in one tablespoon?

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**Metric System Base 10 easy to use**

Prefixes and base units are all you need to know

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**The Prefixes Kilo (k) 1000 x the base Hecto (h) 100 x the base**

Deca (da) 10 x the base No prefix = just the base! Deci (d) 0.1 x the base 1/10 Centi (c) 0.01 x base 1/100 Milli (m) x the base 1/1000 You MUST know these!

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**The Base units Distance = meter (m) Volume = liter (L)**

Mass (weight) = gram (g) Temperature = Kelvin (K) but we use oC There are other but for this class these will work

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**How to make sense of the metric system**

The first letter is the prefix The second letter is the base unit If there is only one letter you are in your base unit.

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**km Prefix (k) Base unit (m) m tells us we are measuring distance**

“meters” K means Kilo “1000” km means 1000 meters 5km can be read 5 “thousand” “meters” (k) (m)

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**You already use a base 10 system every day…**

(Americans just don’t use the prefixes right) Would you rather have 25 dollars or 25 centidollars? Would you rather have a kilodollar or a dollar?

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**How many jumps does it take?**

Ladder Method KILO (k) 1000 HECTO (h) 100 DEKA (da) 10 DECI (d) 0.1 CENTI (c) 0.01 MILLI (m) 0.001 Meters Liters Grams How do you use the “ladder” method? 4 km = _________ m Starting Point Ending Point 1st – Determine your starting point. 2nd – Count the “jumps” to your ending point. 3rd – Move the decimal the same number of jumps in the same direction. How many jumps does it take? 4. __. __. __. = 4000 m 1 2 3

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**Examples Convert the following: 2.0 m to cm 15 cm to m 1.5 km to m**

4500 m to km

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**2.0 m to cm (move two places right) 15 cm to m (move two places left)**

1.5 km to m (move three places right) 1500m 4500 m to km (move three places left) 4.5km

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