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Metric Length Measurement Assessment

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Metric Length Measurement Assessment

Metric Length Measurement Assessment

Ruler and measuring tape illustration

📏 Part 1: Estimation Skills

1. Look at the objects below and estimate their length. Use your knowledge of benchmarks (e.g., a big step ≈ 1 metre, your thumb ≈ 2 cm).

Object A: Pencil

My estimate: _______ cm

Object B: Classroom door

My estimate: _______ metres

Object C: Your shoe

My estimate: _______ cm

Object D: Your desk/table

My estimate: _______ metres

2. Which benchmark did you use to estimate the pencil length?

Width of my thumb (≈ 2 cm)

Length of my hand (≈ 15 cm)

My arm span (≈ 1 metre)

A big step (≈ 1 metre)

📐 Part 2: Measurement and Unit Selection

3. Now measure the same objects using appropriate tools. Record your measurements and round to the nearest unit.

Object A: Pencil

Actual measurement: _______ cm (rounded to nearest cm)

Tool used: _________________

Object B: Classroom door

Actual measurement: _______ metres (rounded to nearest 10 cm)

Tool used: _________________

Object C: Your shoe

Actual measurement: _______ cm (rounded to nearest cm)

Tool used: _________________

Object D: Your desk/table

Actual measurement: _______ metres (rounded to nearest 10 cm)

Tool used: _________________

4. Which tool would be BEST for measuring the width of your fingernail?

Metre stick

Measuring tape

Ruler with millimetre markings

Trundle wheel

🔄 Part 3: Unit Conversion

5. Convert between metric units:

a) 2.5 metres = _______ centimetres

b) 150 centimetres = _______ metres

c) 25 millimetres = _______ centimetres

d) 3.2 metres = _______ millimetres

6. Circle the most appropriate unit for measuring each item:

Height of a giraffe:

millimetres

centimetres

metres

Thickness of a coin:

millimetres

centimetres

metres

Length of a swimming pool:

millimetres

centimetres

metres

🤔 Part 4: Problem Solving and Reflection

7. Sarah measured her bedroom and got 3.67 metres. Round this measurement to:

a) Nearest metre: _______ metres

b) Nearest 10 centimetres: _______ metres

c) Nearest centimetre: _______ metres

8. Compare your estimates from Part 1 with your actual measurements from Part 2. Which object had the biggest difference between your estimate and actual measurement?
9. Explain why you chose different measuring tools for different objects:
10. What strategy helped you make better estimates? What would you do differently next time?

⭐ Part 5: Extension Challenge

11. A waka (Māori canoe) is typically about 15 metres long. How many of your arm spans would equal the length of a waka? Show your working:
12. If you walked around the school field and it took 200 big steps, approximately how many metres did you walk? Explain your reasoning:

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