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METRIC LINEAR UNITS(METERS AND KILOMETERS) GRADE 3 copyright@Ed2netLearning,Inc 1 Hello, How are you doing? Today, we are going to start a new lesson on Linear units. copyright@Ed2netLearning,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) copyright@Ed2netLearning,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) copyright@Ed2netLearning,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. copyright@Ed2netLearning,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. copyright@Ed2netLearning,Inc 6 A relation Kilometer X 10 meter ÷ 10 decimeter centimeter copyright@Ed2netLearning,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 copyright@Ed2netLearning,Inc 8 Convert 4 km to meters Solution – 4 Km 4 x 1,000 4,000 m copyright@Ed2netLearning,Inc 9 Which is longer, a measurement of 1 meter of 30 centimeters? Answer - 1 meter copyright@Ed2netLearning,Inc 10 Which unit would you use to find the length of distance across town? Answer – kilometer (km) copyright@Ed2netLearning,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) copyright@Ed2netLearning,Inc 12 How many meters are there in 3000 km? Answer – 3000 x 1000 m copyright@Ed2netLearning,Inc 13 Fill in the Blanks 6 Km = --- m b) 200 m = ---- km Answer – a) 6000 b) 0.2 or 2/10 a) copyright@Ed2netLearning,Inc 14 ASSESSMENT copyright@Ed2netLearning,Inc 15 1. a) b) c) d) What is the estimated height of the door? 2 2 2 2 m km cm dm copyright@Ed2netLearning,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 copyright@Ed2netLearning,Inc 17 3. What number makes the equation true? 600 cm = m Answer - 6 copyright@Ed2netLearning,Inc 18 4. Distance between two Stations A and B is 5 Km. How much is the distance in meters? Answer – 5,000 m copyright@Ed2netLearning,Inc 19 5. Express 5.36 m to km. Answer – 5.36 /1000 = 0.00536 copyright@Ed2netLearning,Inc 20 6. Compare using >, < or = 9 km 900 m b) 3.2 km 320 m Answer – a) > b) = a) copyright@Ed2netLearning,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 copyright@Ed2netLearning,Inc 22 8. Which is bigger unit? a) b) c) d) meter Centimeter Kilometer decimeter copyright@Ed2netLearning,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 copyright@Ed2netLearning,Inc 24 10. What is the estimated height of the tree? a) b) c) 30 m 30 km 30 cm copyright@Ed2netLearning,Inc 25 Recap Metric system Metric units of length Tools used for measuring length Meter or kiilometer? Solved Examples Practice problems copyright@Ed2netLearning,Inc 26 Well Done! Now Revise worksheets on the Lesson. copyright@Ed2netLearning,Inc 27