Unit 4 Measurement Worksheet Page 19
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48and
S h o w
S h a r e
Talk to your partner.
Suppose you lost your ruler.
How could you use your measurements to find the width
of your textbook?
Centimetres can be used to measure how long,
A referent is an
how tall, or how wide an object is.
object you can think about
Here are some referents to help you think
to hel p you estimate
about centimetres.
a measurement.
Your finger is
about 1 cm wide.
Its width is 1 cm.
The counter is
about 100 cm tall.
Its height is 100 cm.
10 cm
A Base Ten rod is
10 cm long.
Its length is 10 cm.
A referent helps you estimate even if you cannot reach the object.
150
Unit 4 Lesson 5
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