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Estimating Length

Key Concepts

  • Estimate the length of an object by relating the length of an object to a measurement.
  • Estimate lengths using units of inches, feet, and yards. 

Finding the length of the objects

Q: Draw the line under the following objects to show their length.  

Finding the length of the objects. 

Answer:  

Draw the line under the following objects to show their length answer

Q: Encircle the object(s) which is/are smaller. 

Encircle the object(s) which is/are smaller. 

Answer:  

Encircle the object(s) which is/are smaller answer

Q: Use snap cubes to estimate the length of the given figures. 

snap cubes

Answer:  

snap cubes answer

Q: Use handspans to estimate the length of the given figures.  

handspan

Answer:  

handspan answer

Activity  

Identifying objects that are 1 inch & 1 foot. 

activity

Answer:  

Objects that are about one thumb:  

  1. Eraser  
  1. Chalk piece  
  1. Switch  

A thumb is about 1 inch long. 

Objects that are about the same length from your elbow to your fingers:  

  1. Book  
  1. Globe  
  1. Files  
  1. Charts  

The length from your elbow to your fingers is about 1 foot long. 

Estimating the objects that are about few inches long

Some paper clips are about 1 inch long.  

1 inch in short is written as 1 in.  

pin

Now, let us estimate the length of the other objects by using a small paper clip.  

 estimate the length
 estimate the length

Estimating the objects that are about few feet long 

The book is about 1 foot long.  

1 foot in short is written as 1 ft.  

Now, let us estimate the length of the other objects by using a book.   

tv, sofa
piano

Estimating the objects that are about few yards long 

A baseball bat is about 1 yard long.  

1 yard in short is written as 1 yd. 

Now, let us estimate the length of the other objects by using a baseball bat.  

estimate the length
estimate the length

Exercise

  • A small paper clip is about 1 inch. Use this small paper-clips to estimate the length of the objects shown
A small paper clip is about 1 inch. Use this small paper-clips to estimate the length of the objects shown
  • A book is about 1 foot. Use this book to estimate the length of the object shown.
A book is about 1 foot. Use this book to estimate the length of the object shown.
  • A baseball bat is about 1 yard. Use this bat to estimate the length of the object(s) shown.
A baseball bat is about 1 yard. Use this bat to estimate the length of the object(s) shown.
board
  • Would you estimate the distance from your classroom to principal’s office in inches, feet, or yards? How many units?
  • Estimate the length of each object. Circle the answer that gives the best estimate.
Estimate the length of each object. Circle the answer that gives the best estimate.

Concept Map

Concept Map

What we have learned

  • Estimate the length of an object by relating the length of object to a measurement.
  • Estimate lengths using units of inches, feet, and yards.

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