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Measuring Length Accurately

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Measuring Length Accurately

Measuring Length Accurately

Ruler and measuring tape illustration

📏 Part 1: Understanding Measuring Tools

1. Circle the correct answer for each question:

a) When using a ruler, you should start measuring from:

The end of the ruler

The zero mark

The 1 cm mark

b) Which tool is best for measuring curved objects?

Rigid ruler

Measuring tape

Both are equally good

2. Match the Te Reo Māori words with their English meanings:
1. Roa
2. Rārangi
3. Īnenga
4. Poto
A. Measurement
B. Short
C. Long/Length
D. Ruler

📐 Part 2: Reading Measurements

3. Look at the ruler markings below and write the measurements to the nearest millimetre:

a) If a pencil ends at the 12.7 cm mark, its length is _______ cm or _______ mm

b) If a paperclip measures 3.2 cm, this equals _______ mm

c) Convert these measurements:

• 156 mm = _______ cm

• 2.8 cm = _______ mm

• 0.5 m = _______ cm

4. Which units would be most appropriate for measuring these objects? Write cm, mm, or m:

• The width of your fingernail: _______

• The length of your desk: _______

• The height of the classroom door: _______

• The thickness of a book: _______

• The length of the whiteboard: _______

📊 Part 3: Estimation and Measurement Practice

5. Complete this measurement table for objects around you:
Object Estimate (cm) Actual Measurement Difference
Your pencil
Your shoe length
Width of your book
6. Check all the strategies that help you estimate length accurately:

Using your hand span as a reference

Comparing to objects you know the size of

Just guessing randomly

Using your finger width (about 1 cm)

Breaking long objects into smaller parts

🔧 Part 4: Real-World Applications

7. Explain why accurate measurement is important in these situations:

a) Building a deck for your whare:

b) Creating a kapa haka costume:

8. Problem solving: You need to measure the length of a curved path in the school garden. Describe the steps you would take:
9. A student measures their desk and gets 65.7 cm. Another student measures the same desk and gets 66.2 cm. Give two possible reasons for this difference:

Reason 1: ________________________________________________

Reason 2: ________________________________________________

10. Draw a diagram showing the correct way to measure the length of a pencil with a ruler:

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