Measuring Length Accurately

Name:

Date:

📏 Part 1: Choosing the Right Tool and Unit

1. Which measuring tool would be BEST for measuring the length of your pencil?

Ruler

Measuring tape

Metre stick

2. Which unit would be most appropriate for measuring the width of your classroom?

Millimetres (mm)

Centimetres (cm)

Metres (m)

3. When using a ruler, you must always start measuring from:

The 1 cm mark

The zero (0) mark

Any mark on the ruler

4. Check ALL the things you should do when measuring accurately:

Line up the zero mark with one end of the object

Keep the ruler straight along the object

Always include units in your answer

Estimate first, then measure

📐 Part 2: Reading Measurements

5. Look at this ruler reading. The pencil measures _______ cm or _______ mm.

(Imagine a pencil from 0 to the 8.4 cm mark)

6. If your desk is 120 cm long, this is the same as _______ metres and _______ centimetres.

7. You estimate a book is 25 cm long, but when you measure it, it's actually 23 cm. The difference between your estimate and the actual measurement is _______ cm.

8. Put these measurements in order from SHORTEST to LONGEST:

15 mm, 2 cm, 25 mm, 1.5 cm

Shortest: _________ → _________ → _________ → _________ Longest

✏️ Part 3: Measurement Practice

9. Choose 3 objects in your classroom to measure. Complete the table below:

Object 1: _________________ Estimate: _______ Actual: _______ Tool used: _______

Object 2: _________________ Estimate: _______ Actual: _______ Tool used: _______

Object 3: _________________ Estimate: _______ Actual: _______ Tool used: _______

10. Explain why it's important to include units when recording measurements:

11. Extension Challenge: If you measured something that was 2.5 metres long, how would you write this measurement in centimetres? Show your working: