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METRIC LINEAR UNITS(METERS AND KILOMETERS) GRADE 3 [email protected],Inc 1 Hello, How are you doing? Today, we are going to start a new lesson on Linear units. [email protected],Inc 2 Metric System Metric System – A group of units based on measuring by tens. Various units of metric systems. • Kilometer (km) • Decimeter (dm) • Centimeter (cm) • Meter (m) [email protected],Inc 3 Metric units of length Various units of Metric System are related to each other. 1 meter (m) = 100 centimeter (cm) 1 decimeter (dm) = 10 centimeter (cm) 1 meter (m) = 10 decimeter (dm) 1 kilometer (km) = 1,000 meter (m) [email protected],Inc 4 Tools used for measuring length For measuring small distances in centimeters, centimeter scale is used. For measuring larger distances in meters, meter stick or measuring tape is used. [email protected],Inc 5 Meter or Kilometer? Kilometer is larger unit than meter. For measuring larger distances like length of the road, kilometer is used. For measuring small distances like length of the room or door meter is used. [email protected],Inc 6 A relation Kilometer X 10 meter ÷ 10 decimeter centimeter [email protected],Inc 7 Important Tips To convert meter to kilometers, divide with 1,000. Example – 50 meters = 50/1,000 = 0.050 Km To convert kilometers to meters, multiply with 1,000 Example – 2 Km = 2 x 1,000 = 2,000 m [email protected],Inc 8 Convert 4 km to meters Solution – 4 Km 4 x 1,000 4,000 m [email protected],Inc 9 Which is longer, a measurement of 1 meter of 30 centimeters? Answer - 1 meter [email protected],Inc 10 Which unit would you use to find the length of distance across town? Answer – kilometer (km) [email protected],Inc 11 Which metric unit would you use to find the distance between the front of the classroom and the back of the classroom? Answer – meter (m) [email protected],Inc 12 How many meters are there in 3000 km? Answer – 3000 x 1000 m [email protected],Inc 13 Fill in the Blanks 6 Km = --- m b) 200 m = ---- km Answer – a) 6000 b) 0.2 or 2/10 a) [email protected],Inc 14 ASSESSMENT [email protected],Inc 15 1. a) b) c) d) What is the estimated height of the door? 2 2 2 2 m km cm dm [email protected],Inc 16 2. a) b) c) Rock and his family are playing croquet. Rock hits the ball 8 m. How many centimeters did he hit the ball? 80 cm 0.80 cm 800 cm [email protected],Inc 17 3. What number makes the equation true? 600 cm = m Answer - 6 [email protected],Inc 18 4. Distance between two Stations A and B is 5 Km. How much is the distance in meters? Answer – 5,000 m [email protected],Inc 19 5. Express 5.36 m to km. Answer – 5.36 /1000 = 0.00536 [email protected],Inc 20 6. Compare using >, < or = 9 km 900 m b) 3.2 km 320 m Answer – a) > b) = a) [email protected],Inc 21 7. Elise covered 4 km by bus and 200 m by bus to reach his school. How far is his school from home? Answer – 4200 m [email protected],Inc 22 8. Which is bigger unit? a) b) c) d) meter Centimeter Kilometer decimeter [email protected],Inc 23 9. Two ropes A and B have length of 2,000 m and 2 km respectively. Which rope is longer? Answer – Both ropes are equal [email protected],Inc 24 10. What is the estimated height of the tree? a) b) c) 30 m 30 km 30 cm [email protected],Inc 25 Recap Metric system Metric units of length Tools used for measuring length Meter or kiilometer? Solved Examples Practice problems [email protected],Inc 26 Well Done! Now Revise worksheets on the Lesson. [email protected],Inc 27