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