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.
Answer:
Q: Encircle the object(s) which is/are smaller.
Answer:
Q: Use snap cubes to estimate the length of the given figures.
Answer:
Q: Use handspans to estimate the length of the given figures.
Answer:
Activity
Identifying objects that are 1 inch & 1 foot.
Answer:
Objects that are about one thumb:
- Eraser
- Chalk piece
- Switch
A thumb is about 1 inch long.
Objects that are about the same length from your elbow to your fingers:
- Book
- Globe
- Files
- 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.
Now, let us estimate the length of the other objects by using a small paper clip.
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.
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.
Exercise
- 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 baseball bat is about 1 yard. Use this bat to estimate the length of the object(s) shown.
- 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.
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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