Need
for standard Measurement.
Activity 1
Ragu measured the length
of his class table using the non−standard measurements and tabulated them as
follows. complete the following table by measuring the length of your class table
along with your friends by measuring the length of your class table.
Activity 2
Measure the length of a
ribbon by your hand span.
Friend 1 −______________ hands pan
Friend 2 −______________ hands pan
Friend 3 −______________ hands pan
Friend 4 −______________ hands pan
Measurements made using
non standard units differ from person to person.
Can you guess the reason
for their different answers?
Measuring the length of objects around
us using simple tools.
Activity 3
Form a group of 5
members and measure the length of the blackboard in you classroom using the
following tools and tabulate it.
Notebook and a ruler
Observe the measurements and discuss
Did you note that all the measurements made by Kala and her friends are same?
MEASUREMENT OF LENGTH
NON − STANDARD UNITS
1. Finger
width
2. Hand span
3. Cubit
4. Pace
5. Foot span.
( Measurement varies from person to person
)
STANDARD UNITS
1. Millimeter
2. Centimeter
3. Meter
4. Kilometer
( Measurement remains
the same. )
Teacher’s note : Teacher can facilitate
the children to understand the need for standard measurements.
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