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Measuring Length: Centimetres and Metres

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Measuring Length: Centimetres and Metres

Measuring Length: Centimetres and Metres

Ruler and measuring tape illustration

📏 Part 1: Estimation and Measurement

1. Look at these classroom objects. Estimate their length, then measure them with a ruler or measuring tape.

Remember: Use centimetres (cm) for smaller objects and metres (m) for larger objects.

Object My Estimate Actual Measurement
Pencil _______ cm _______ cm
Book _______ cm _______ cm
Desk _______ m _______ m
Jump rope _______ m _______ m

📊 Part 2: Ordering by Length

2. Here are some objects with their lengths. Write them in order from shortest to longest.

Objects and their lengths:

  • Paperclip: 3 cm
  • Classroom door: 2 metres
  • Eraser: 5 cm
  • Whiteboard: 1 metre 20 cm
  • Crayon: 8 cm

Order from shortest to longest:

1. _________________________________
2. _________________________________
3. _________________________________
4. _________________________________
5. _________________________________

🔄 Part 3: Converting Between Centimetres and Metres

3. Remember: 1 metre = 100 centimetres. Convert these measurements:

a) 200 cm = _______ metres

b) 3 metres = _______ cm

c) 150 cm = _______ metre _______ cm

d) 2 metres 30 cm = _______ cm

e) 250 cm = _______ metres _______ cm

4. Circle the best unit to measure each object:

Height of a tree:

centimetres
metres

Length of a spoon:

centimetres
metres

Width of a football field:

centimetres
metres

Length of your thumb:

centimetres
metres

🧮 Part 4: Word Problems

5. Sarah has a rope that is 3 metres long. How many centimetres is that?

Answer: _______ centimetres

6. A table is 120 cm long and a desk is 1 metre 50 cm long. Which is longer? By how much?

The _____________ is longer by _______ cm.

7. Tom measured his bedroom and found it was 4 metres long. His sister's bedroom is 350 cm long. Whose bedroom is longer?

Answer: _________________________________

🎯 Part 5: Estimation Challenge

8. Without measuring, estimate the length of these items. Then check your answers if you can!

a) The width of your hand: _______ cm

b) The length of your classroom: _______ metres

c) The height of your chair: _______ cm

d) The length of a car: _______ metres

9. Draw a line that you think is exactly 10 centimetres long:
10. Explain why we use different units (cm and m) for measuring different objects:

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