Metric Conversions Ladder Method Adapted from a ppt

Metric Conversions Ladder Method Adapted from a ppt by T. Trimpe 2008 at http: //sciencespot. net/

First, Some Definitions Grams = weight

Litres = volume

Metres = length, distance or height

Think of metres with an athletic track – e. g. 100 m (100 metres)

800 m = 2 x 400 m

0. 5 kilometre Task: Use Google Earth’s measuring tool to find 0. 5 km and 1. 0 km in your local area (for example, distance across your school grounds)

1 kilometre

“King Henry” Method 1 2 KILO 1000 Units King HECTO 100 Units Henry 3 DEKA 10 Units Doesn’t 1 Usually Metres Litres Grams DECI 0. 1 Unit CENTI 0. 01 Unit Drink Choc MILLI 0. 001 Unit Milk 4 km = _____ m How do you use the “King Henry” method? 1 st – Determine your starting point. Starting Point 2 nd – Count the “jumps” to your ending point. How many jumps does it take? 3 rd – Move the decimal the same number of jumps in the same direction. Ending Point 4. __. __. = 4000 m 1 2 3

“King Henry” Method 1 2 KILO 1000 Units King HECTO 100 Units Henry 3 DEKA 10 Units Doesn’t Usually Metres Litres Grams DECI 0. 1 Unit CENTI 0. 01 Unit Drink Choc MILLI 0. 001 Unit Milk 4 km = _____ m How do you use the “King Henry” method? 1 st – Determine your starting point. Starting Point 2 nd – Count the “jumps” to your ending point. How many jumps does it take? 3 rd – Move the decimal the same number of jumps in the same direction. Ending Point 4. __. __. = 4000 m 1 2 3 3 zeros

King Henry Doesn’t Usually Drink Choc Milk Example: Converting 5 Kilograms to Grams https: //www. youtube. com/watch? v=FI 1 p. SWf. Btv. Q

Conversion Practice Try these conversions using the King Henry method. 1000 mg = _______ g 1 L = _______ m. L 160 cm = _______ mm 14 km = _______ m 109 g = _______ kg 250 m = _______ km Compare using <, >, or =. 56 cm 6 m 7 g 698 mg

Conversion Practice Try these conversions using the ladder method. 1000 mg = 1. 0 g 1 L = 1000 ml (or cc) 160 cm = 1600 mm 14 km = 14000 m 109 g = 0. 109 kg 250 m = 0. 250 km Compare using <, >, or =. 56 cm < 6 m 7 g > 698 mg

Metric Conversion Challenge Write the correct abbreviation for each metric unit. 1) Kilogram _____ 4) Millilitre _____ 7) Kilometre _____ 2) Metre _____ 5) Millimetre _____ 8) Centimetre _____ 3) Gram _____ 6) Litre _____ 9) Milligram _____ Try these conversions, using the ladder method. 10) 2000 mg = _______ gm 15) 5 L = _______ m. L 20) 16 cm = _______ mm 11) 104 km = _______ m 16) 198 g = _______ kg 21) 2500 m = _______ km 12) 480 cm = _____ m 17) 75 m. L = ______L 22) 65 g = _______ mg 13) 5. 6 kg = _____ gm 18) 50 cm = _____ m 23) 6. 3 cm = _____ mm 14) 8 mm = _____ cm 19) 5. 6 m = _____ cm 24) 120 mg = _____ gm

Metric Conversion Challenge Write the correct abbreviation for each metric unit. 1) Kilogram kg 4) Millilitre ml 7) Kilometre km 2) Metre m 5) Millimetre mm 8) Centimetre cm 3) Gram g or gm 6) Litre L or l 9) Milligram mg Try these conversions, using the ladder method. 10) 2000 mg = 2 gm 15) 5 L = 5000 ml 20) 16 cm =160 mm 11) 104 km = 104, 000 m 16) 198 g = 0. 198 kg 21) 2500 m = 2. 5 km 12) 480 cm = 4. 8 m 17) 75 ml = 0. 075 L 22) 65 g = 65, 000 mg 13) 5. 6 kg = 5600 gm 18) 50 cm = 0. 5 m 23) 6. 3 cm = 63 mm 14) 8 mm = 0. 8 cm 19) 5. 6 m = 560 cm 24) 120 mg = 0. 120 g

Compare using <, >, or = 25) 63 cm 26) 536 cm 6 m 53. 6 dm 27) 5 g 28) 43 mg 508 mg 5 g 30) 3. 6 m 29) 1, 500 m. L 36 cm 1. 5 L

Measuring Length How many millimeters are in 1 centimeter? 1 centimeter = 10 millimeters What is the length of the line in centimeters? _______cm What is the length of the line in millimeters? _______mm What is the length of the line to the nearest centimeter? ____cm HINT: Round to the nearest centimeter – no decimals. Ruler: http: //www. k 12 math. com/math-concepts/measurement/ruler-cm. jpg

Metric Units Mass refers to the amount of matter in an object. The base unit of mass in the metric system in the kilogram and is represented by kg. Standard: 1 kilogram is equal to the mass of the International Prototype Kilogram (IPK), a platinum-iridium cylinder kept by the BIPM at Sèvres, France. Kilogram Prototype Metric Units 1 Kilogram (km) = 1000 Grams (gm) 1 Gram (gm) = 1000 Milligrams (mg) Which is larger? A. 1 kilogram or 1500 grams C. 12 milligrams or 12 kilograms B. 1200 milligrams or 1 gram D. 4 kilograms or 4500 grams Kilogram Prototype Image - http: //en. wikipedia. org/wiki/Kilogram