# Title: Basic Metric Measurements Conversion (police)

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1 X X Stackable Certificate Documentation Technology Study / Life skills EL-Civics Career Pathways Police Paramedic Fire Rescue Medical Asst. EKG / Cardio Phlebotomy Practical Nursing Healthcare Admin Pharmacy Tech IMT AMT HVAC Welding Other: Title: Basic Metric Measurements Conversion (police) Objectives Students will be able to remember the order of metric units. Students will be able to convert basic metric measurements. Time frame to Complete 30 minutes NRS EFL 4 Standard(s) Addressed in Lesson Use Math to Solve Problems and Communicate Benchmark(s) Addressed in Lesson 4.13 Convert fluently, within measurement systems (metric, customary, time), from one unit to another in order to solve contextual problems and express the conversions using appropriate unit labels Identify, extend and construct arithmetic/geometric patterns and sequences that are one-step and linear or exponential Evaluate and simplify algebraic expressions and solve equations. Materials How to Convert Basic Metric Measurements worksheet Calculator (optional) Learner Prior Knowledge Place value Basic multiplication and division by powers of ten Activities Step 1 Survey students, by a show of hands, about how many are familiar with the metric system. Volunteers may share what they know (they may be familiar with running a 5K or how some food packaging is labeled in grams, or they may only know that it is different than the measurements commonly used in the United States). Introduce the metric system as a measurement system that is based on units of ten. Step 2 Distribute the worksheet How to Convert Basic Metric Measurements. Explain to students that the metric system of measurement is based on ten. If review is needed, share a few examples of multiplying and dividing by ten (with answers as both whole numbers and decimals). Step 3 Share the mnemonic devices on the How to Convert Basic Metric Measurements worksheet with students as a means to remember the order of metric units: kilo, hecto, deka, unit (ones), deci, centi, milli. Write one sentence and the units on the board to use as a reference during the lesson.

2 Step 4 Explain and demonstrate the conversion process. Answer questions as needed. Step 5 Students complete the second side of the sheet individually. As they work, the teacher can circulate to answer questions and check work as needed. When the class is finished, check answers together. Assessment/Evidence Students will solve equations and label metric conversions correctly. Adaptations for Beginning Students Beginning students could work in pairs and utilize a calculator. Adaptations for Advanced Students More advanced students could also write each expression using scientific notation. Teacher Reflection/Lesson Evaluation This lesson was created by Middletown ABLE.

3 The metric system is based upon units of ten. Mnemonic devices These funny sentences can help you remember the order of metric units for common conversions. The first letter of each word is the same as the first letter of the metric prefix. Kim Hit David [until] David Cried Mama! King Henry Died [until] Drinking Chocolate Milk King Henry Died [U] Didn t Care Much The metric measurements are: Kilo Hecto Deka [ unit ] Deci Centi Milli A Shortcut to Converting from one unit to another: 1. Draw a line and label it with the prefixes as shown in the diagram below. Unit will be the unit of measurement you're working with (meter, gram, etc.) Kilo------Hecto-----Deka------[Unit]------Deci------Centi------Milli. 2. Draw an arrow from the prefix you have to the prefix you want to convert to, making stops at each unit of measure along the way. So if you want to change kilometers into millimeters, for example, then draw a series of arrows from "kilo" to "milli". Kilo------Hecto-----Deka------[ Meters ]------Deci------Centi------Milli. 1, Determine whether you are converting into a smaller or a larger unit. If the arrow is pointing right, you are converting from a larger unit into a SMALLER one. If the arrow is pointing left, you are going from a smaller unit into a LARGER one. 4. Move the decimal point one digit the same direction as the number of places you found in the previous step. If there is no decimal in the number, assume it's after the last digit in the number. For example, when converting from kilometers to millimeters, you will move the decimal point six places to the right. 1 kilometer = 1,000,000 millimeters To convert 5 centigrams to grams, you need to move the decimal point two places to the left. 5 centigrams = 0.05 grams 5. Add zeroes as necessary. Only do this if you have run out of digits in the number you were converting. For example, to convert 2.5 meters to millimeters, you have to move the decimal point to the right three places. There's only one more digit after the decimal point, so you would need to add two zeroes. Final answer: 2,500 millimeters.

4 Complete the table with equivalent measures: larger units smaller units K kilo kiloliters H hecto 0.01 hectograms 50 hectometers D deka 500 dekameters [unit] D deci 1 gram 10 decigrams C centi M milli 2 liters 2,000 centiliters 500,000 centimeters Mathematically, as you move the decimal point one place to the right (moving right on the chart), you are multiplying by meter x 10 = 10 decimeters As you move the decimal point one place to the left (moving left on the chart), you are dividing by liters 10 = 0.2 dekaliters Which is larger? (Circle the larger number in the following pairs.) A) 1 decimeter OR 1 meter B) 63 kilograms OR 18 grams C) 1 liter OR 212 centiliters D) 72 centigrams OR 41 dekagrams Solve the equations. A) Eight grams of marijuana were found in the suspect s car. How many centigrams? B) The officer chased the suspect approximately 15 hectometers through the field. How many kilometers did the officer run? C) Police seized kilograms of crack cocaine from the suspect s home. The estimated value is \$22,830. What is the value of one gram of crack cocaine?

5 The metric system is based upon units of ten. Mnemonic devices These funny sentences can help you remember the order of metric units for common conversions. The first letter of each word is the same as the first letter of the metric prefix. Kim Hit David [until] David Cried Mama! King Henry Died [until] Drinking Chocolate Milk King Henry Died [U] Didn t Care Much The metric measurements are: Kilo Hecto Deka [ unit ] Deci Centi Milli A Shortcut to Converting from one unit to another: 1. Draw a line and label it with the prefixes as shown in the diagram below. Unit will be the unit of measurement you're working with (meter, gram, etc.) Kilo------Hecto-----Deka------[Unit]------Deci------Centi------Milli. 2. Draw an arrow from the prefix you have to the prefix you want to convert to, making stops at each unit of measure along the way. So if you want to change kilometers into millimeters, for example, then draw a series of arrows from "kilo" to "milli". Kilo------Hecto-----Deka------[ Meters ]------Deci------Centi------Milli. 1, Determine whether you are converting into a smaller or a larger unit. If the arrow is pointing right, you are converting from a larger unit into a SMALLER one. If the arrow is pointing left, you are going from a smaller unit into a LARGER one. 4. Move the decimal point one digit the same direction as the number of places you found in the previous step. If there is no decimal in the number, assume it's after the last digit in the number. For example, when converting from kilometers to millimeters, you will move the decimal point six places to the right. 1 kilometer = 1,000,000 millimeters To convert 5 centigrams to grams, you need to move the decimal point two places to the left. 5 centigrams = 0.05 grams 5. Add zeroes as necessary. Only do this if you have run out of digits in the number you were converting. For example, to convert 2.5 meters to millimeters, you have to move the decimal point to the right three places. There's only one more digit after the decimal point, so you would need to add two zeroes. Final answer: 2,500 millimeters.

6 Complete the table with equivalent measures: larger units smaller units K kilo kilograms kiloliters 5 kilometers H hecto 0.01 hectograms 0.02 hectograms 50 hectometers D deka 0.1 dekagrams 0.2 dekaliters 500 dekameters [unit] D deci 1 gram 10 decigrams 2 liters 20 decigrams 5,000 meters 50,000 decimeters C centi 100 centigrams 200 centigrams 500,000 centimeters M milli 1000 milligrams 2,000 centiliters 5,000,000 millimeters Mathematically, as you move the decimal point one place to the right (moving right on the chart), you are multiplying by meter x 10 = 10 decimeters As you move the decimal point one place to the left (moving left on the chart), you are dividing by liters 10 = 0.2 dekaliters Which is larger? (Circle the larger number in the following pairs.) A) 1 decimeter OR 1 meter B) 63 kilograms OR 18 grams C) 1 liter OR 212 centiliters D) 72 centigrams OR 41 dekagrams Solve the equations. D) Eight grams of marijuana were found in the suspect s car. How many centigrams? 8 x 100 = 800 centigrams E) The officer chased the suspect approximately 15 hectometers through the field. How many kilometers did the officer run? 15 hm / 10 = 1.5 kilometers F) Police seized kilograms of crack cocaine from the suspect s home. The estimated value is \$22,830. What is the value of one gram of crack cocaine? kg x 1000 = grams \$22,830 / = \$100 per gram

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