📏 Year 3 Length Activity Sheet
📏 Understanding mm, cm, and m
Millimetres (mm): Smallest standard unit. 10 mm = 1 cm
Centimetres (cm): Used for small things. 100 cm = 1 metre
Metres (m): Used for longer lengths like doors, rooms, etc.
Conversions to remember:
- 10 mm = 1 cm
- 100 cm = 1 m
🔁 Conversion Practice
- 70 mm = cm
- 3 m = cm
- 4 cm = mm
- 1 m and 30 cm = cm
📦 Real-World Problem Solving
1. Rani has a ribbon that is 80 cm long. She cuts off 35 cm.
How much ribbon is left? cm
How much ribbon is left? cm
2. A door is 2 metres tall. A box is 130 cm tall.
Will the box fit through the door, assuming it cannot be tilted? Type yes or no
Will the box fit through the door, assuming it cannot be tilted? Type yes or no
4. A stick is 1 metre long. A worm is 80 cm shorter.
How long is the worm? cm
How long is the worm? cm
5. A rope is 200 cm long. How many metres is that?
m
6. A piece of wood is 1 m and 30 cm long. How many centimetres is that?
cm
7. A pencil is 15 cm long. How many millimetres is that?
mm
9. A book is 25 cm wide. How many millimetres is that?
mm
10. A swimming pool is 15 m long. How many centimetres is that?
cm