📏 Part 1: Understanding Estimation

1. What does it mean to estimate a measurement?

2. Circle the best reasons why we estimate before measuring:

It saves time

It helps us choose the right measuring tool

It makes our work look neat

It helps us check if our answer is reasonable

It's more accurate than measuring

📐 Part 2: Length Estimation Practice

3. Look at your desk. Estimate its length using different non-standard units:

My estimate using hand spans: _______ hand spans

My estimate using paper clips: _______ paper clips

Actual measurement with ruler: _______ centimetres

4. Estimate the length of your pencil:

My estimate: _______ centimetres

Actual measurement: _______ centimetres

Difference between estimate and actual: _______ centimetres

5. Which estimate was closer to the actual measurement?

My desk length estimate

My pencil length estimate

They were equally close

📦 Part 3: Area Estimation

6. Choose a rectangular object (like a book cover). Complete the estimation activity:

Object chosen: _________________________

Estimated area using paper clips: _______ paper clips

Actual length: _______ cm

Actual width: _______ cm

Calculated area: _______ cm²

7. Draw your object below and show how you estimated its area:

8. Was your estimate reasonable? Explain why or why not:

🔍 Part 4: Comparing Units

9. Match each measuring situation with the most appropriate unit:

1. Length of classroom

2. Width of your thumb

3. Area of the whiteboard

4. Length of a paper clip

A. Millimetres

B. Square metres

C. Metres

D. Centimetres

10. Fill in the blanks with estimation words:

My desk is _____________ 60 centimetres long. The classroom door is _____________ 2 metres tall. The area of my exercise book is _____________ 300 square centimetres.

Word bank: about, approximately, close to, roughly

🧮 Part 5: Problem Solving

11. Sarah estimates that her bedroom floor is 12 hand spans long and 10 hand spans wide. If her hand span is about 15 cm, estimate the area of her bedroom floor:

Estimated area: _____________ square centimetres or _____________ square metres

12. Why might using hand spans give a different result for different people?

13. List three situations in everyday life where estimation would be more useful than exact measurement: