Name: 
 

Lesson 2 - Estimating Lengths



 
Estimate whether each object is more than or less than 10 cm in length.
a.
more than 10 cm
b.
less than 10 cm
 

 1. 

the width of your thumb
 

 2. 

the thickness of your math textbook
 

 3. 

the length of your arm
 

 4. 

the length of a paper clip
 

 5. 

the height of your desk
 
 
What would you use to estimate the length of each object?
a.
your thumbnail
b.
your hand
c.
your forearm
 

 6. 

the length of your eraser
 

 7. 

the length of your math textbook
 

 8. 

the height of a computer mouse
 

 9. 

the width of a doorway
 

 10. 

What would you use to estimate the height of your classroom?
a.
a classmate’s height
c.
my desk’s height
b.
my forearm’s length
d.
my eraser’s length
 



 
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