## 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.