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**Metric System prefixes**

Using the International System of Units

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**Let’s review Metric Units**

with Tim and Moby!

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**Metric unit helpful hint**

To memorize the six prefixes you really need to know, remember this sentence: King Henry Doesn’t Usually Drink Chocolate Milk

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**Metric unit helpful hint**

If you look closely, you will see that each prefix is ten times bigger than the one to its right and one-tenth as big as the one to its left.

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**Metric conversion line**

If you write the prefixes in a line, you can use this to convert from one measurement to another.

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**Tim’s and Moby's Example**

How many milligrams are in 5 Hectograms?

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**On your prefix line, write the number above the prefix and place your finger under the prefix.**

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**Count the number of units your finger passes while moving to the unit you’re converting.**

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**Take your number, and move the decimal point the same number of places in the same direction.**

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**Take your number, and move the decimal point the same number of places in the same direction.**

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**Add a 0 for each place the decimal moves.**

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**There you have it: 5 hectograms is the same as 500,000 milligrams.**

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Example #1- How many milliliters are in 2 liters? ___ ___ ___ ___ ___ ___ ___ Kilo Hecto Deka Unit Deci Centi Milli Liter 2 liters = 2000 milliliters 2 L = 2000 mL 2.

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Example #2- How many grams are in 8 kilograms? ___ ___ ___ ___ ___ ___ ___ Kilo Hecto Deka Unit Deci Centi Milli Gram 8 kilograms = 8000 grams 8 kg = 8000 g 8.

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Example #3- How many meters are in 4 centimeters? ___ ___ ___ ___ ___ ___ ___ Kilo Hecto Deka Unit Deci Centi Milli Meter 4 centimeters = 0.04 meters 4 cm = 0.04 m 4.

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Example #4- How many kilometers are in 6 meters? ___ ___ ___ ___ ___ ___ ___ Kilo Hecto Deka Unit Deci Centi Milli Meter 6 meters = kilometers 6 m = km 6.

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Example #5- How many milliliters are in 25 liters? ___ ___ ___ ___ ___ ___ ___ Kilo Hecto Deka Unit Deci Centi Milli Liter 25 liters = 2500 milliliters 25 L = 2500 mL

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Example #6- How many kilometers are in 62 meters? ___ ___ ___ ___ ___ ___ ___ Kilo Hecto Deka Unit Deci Centi Milli Meter 62 meters = kilometers 62 m = km

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**Just for fun… other prefixes**

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