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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.

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

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

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

#### Activity

Identifying objects that are 1 inch & 1 foot.

Objects that are about one thumb:

1. Eraser
1. Chalk piece
1. Switch

A thumb is about 1 inch long.

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

### 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.

### 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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