Pre-Algebra 2 Lesson A 1 a Presented to

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Pre-Algebra 2 Lesson A. 1 a Presented to my 1 st period class 18 March 2018

THE METRIC SYSTEM 18 March 2018

WHY DO WE USE THE METRIC SYSTEM? Almost all other countries are using the metric system n Other countries’ companies are refusing to buy products from the U. S. if not labeled in metric units n Scientists need a universal way to communicate data n

WHAT DOES THE METRIC SYSTEM MEASURE? The gram measures mass or how much something weighs n The liter measures volume which is used when measuring liquids n The meter measures the length of an object or the distance from place to place n

Metric System • The metric system is based on a base unit that corresponds to a certain kind of measurement • Length = meter • Volume = liter • Weight (Mass) = gram • Prefixes plus base units make up the metric system – Example: • Centi + meter = Centimeter • Kilo + liter = Kiloliter

Metric System • The three prefixes that are used the most are: – kilo – centi – milli Base Units kilo hecto deca meter gram liter deci centi milli

THE METRIC CONVERSION CHART (STAIRCASE METHOD) King To convert to a smaller unit, move decimal point to the right or multiply. Kilo Henry 1000 Hecto Danced units 100 Deka Back units Down 10 Basic units Deci Chocolate Unit 0. 1 Centi Mountain units 0. 01 Milli units 0. 001 units To convert to a larger unit, move decimal point to the left or divide

TRY THIS USING THE STAIRCASE METHOD 1000 mg = ______ g Step 1: Determine if you are going to go up or down the ladder. Step 2: Determine how many steps there are from milligrams to grams. Step 3: Move the decimal point the amount of places that was determined in steps 1 & 2.

TRY THIS USING THE STAIRCASE METHOD 1000 mg = ______ g 1 Step 1: Determine if you are going to go up or down the ladder. Step 2: Determine how many steps there are from milligrams to grams. Step 3: Move the decimal point the amount of places that was determined in steps 1 & 2.

TRY THIS USING THE STAIRCASE METHOD. 15 L = _____ ml

TRY THIS USING THE STAIRCASE METHOD. 15 L = _____ ml 150

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