_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.1 Conversion of customary units Grade 5

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.2 Welcome  Hello!  How are you today.  Lets start a new lesson!

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.3 Warm up!! oz = ___ lb 2. 5 c = ___ fl oz lb = ___ T 4. 8 gal = ___ qt

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.4 Length in metric system  The metric system is a decimal system of weights and measures.  A meter is the basic unit of length in the metric system.  The most commonly used metric units of length are shown below UnitModelBenchmark 1 millimeter (mm)Thickness of a dime25 mm ≈ 1 inch 1centimeter (cm)Half the width of a penny 2.5 cm ≈ 1 inch 1 meter (m)Width of a doorway 1 m ≈ 1.1 yard 1 kilometer (km)Six city blocks 6.2 km ≈ 1 mile

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.5 Length in metric system  Example Write the metric unit of length that you would use to measure the width of a paper clip. The width of a paper clip is greater than the thickness of dime, but less than the width of a penny. So, the millimeter is an appropriate unit of measure.

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.6 Your turn!!  What Metric unit of length would you use to measure 1. Thickness of a nickel 2. Height of a cereal box

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.7 Mass and capacity in the metric system  The most commonly used metric units of mass and capacity are shown below. UnitModelBenchmark 1 milligram (mg)Grain of salt1 mg ≈ oz 1 gram (g)Small paper clip1 g ≈ 0.04 oz 1 kilogram (kg)Six medium apples1 kg ≈ 2 lb 1 milliliter (ml)Eyedropper1 ml ≈ 0.03 fl oz 1 liter (l)Small pitcher1 l ≈ 1 qt

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.8 Mass and capacity in the metric system  Example What metric unit of mass and capacity you would use to measure 1. Sheet of notebook paper: A sheet of notebook paper has a mass greater than a small paper clip, but less than six apples. So, gram is the appropriate unit. 2. Glass of milk: A glass of milk is grater than an eyedropper and less than a small pitcher. So, millimeter is the appropriate unit.

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.9 Your turn!!  What metric unit of mass and capacity would you use to measure 1.Bag of potatoes 2.Large fish bowl

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.10 Changing units  To change from one unit to another within metric system, you either multiply or divide by powers of 10. The chart below shows the relationship between the units in the metric system and the powers of 10. 1, kilo thousands hecto hundreds deca tens basic unit ones deci tenths centi hundredths milli thousandths

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.11 Changing units  To change from larger unit to smaller unit, you need to multiply.  To change from smaller unit to larger unit, you need to divide. Multiply × 1,000 × 100 × 10 km m cm mm ÷ 1,000 ÷ 100 ÷ 10 Larger unit Smaller unit Divide

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.12 Changing units  Example 135 g = ___ kg Since 1,000 grams = 1 kilogram, divide by 1, ÷ 1,000 = So, 135 g = kg

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.13 Your turn!!  ___ mm = 26.8 cm

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.14 Changing units  Changing units to solve a problem  Example Use the table below to determine the total number of meters in a triathlon.  Total equals sum of swim, bike and run times 1,000 m = (s + b + r) × 1,000 m = ( ) × 1,000 m = 41 × 1,000 m = 41,000 Triathlon SwimBikeRun 1 km30 km10 km Write the equation. First, find the sum in the parentheses. Multiply. There are 41,000 meters in the triathlon.

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.15 Practice Complete the following l = ____ ml mg = ___ kg cm = ___m

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.16 Practice Complete the following. 4. 4m = ___cm cm = ___ mm cm = ___ Km

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.17 Practice 7. Write 25.9 kilograms in grams. 8. How many centimeters are in 0.82 meter? 9. Change 7 milligrams to grams.

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.18 Practice 10. A scooter goes up to 20 kilometers per hour. How many meters per hour can it travel?

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.19 Assessment 1. Explain how to change litres to milliliters mm = ___ cm mg = __ g

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.20 Assessment (Cont.) l = ___ ml 5. ___ mm = 3.8 cm g = ___ mg

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc g = ___ kg 8. Sabrina mixes 6.3 litres of punch. How many milliliters is this? Assessment (Cont.)

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc Sam’s house is 0.6 km from Julia’s house. How many meters is this? 10. What metric unit of length would you use to measure the length of a skateboard? Assessment (Cont.)

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.23 Recap In this lesson you have learnt: 25 mm ≈ 1 inc 2.5 cm ≈ 1 inch 1 m ≈ 1.1 yard 6.2 km ≈ 1 mile We divide to change smaller units into larger units and multiply to change larger units to smaller units. 1mg ≈ oz 1 g ≈ 0.04 oz 1 kg ≈ 2 lb 1 ml ≈ 0.03 fl oz 1 l ≈ 1 qt

_______________________________________________________________________ Copyright © Ed2Net Learning, Inc.24 Excellent Work!!! Now Practice your worksheets to learn more about conversion of units.