OpenOlympiad
Concept 4 of 8Foundation
Video

Units of length and conversions

Smallest to largest:

  • 1 cm = 10 mm
  • 1 m = 100 cm = 1000 mm
  • 1 km = 1000 m

Choose the right unit:

  • Ant body → mm
  • Notebook → cm
  • Room → m
  • Between cities → km
Example
2.5 km = 2,500 m = 2,50,000 cm = 25,00,000 mm.
35 mm = 3.5 cm = 0.035 m.
💡 Tip:Going from big → small, you multiply. Small → big, you divide.
Prefer a video? Open YouTube search for “unit conversion length class 6

🎯 Try it!

5 questions to check what you just read.

0 / 5
  1. Q1.1 km = ___ m:
  2. Q2.1 m = ___ cm:
  3. Q3.1 cm = ___ mm:
  4. Q4.2.5 m in cm:
  5. Q5.Best unit for length of a pen: