Chapter 5 of Class 5 Maths Mela, Far and Near, teaches measuring and comparing distances using millimetres, centimetres, metres, and kilometres.
Key Concepts
Units, smallest to largest: mm → cm → m → km.
Conversions: 10 mm = 1 cm; 100 cm = 1 m; 1000 m = 1 km.
Estimate first, then measure: guessing a length before measuring builds a feel for real-world sizes and helps catch measurement errors.
Quick Recap
- Use mm/cm for small objects (a pencil, a leaf), m for rooms and buildings, and km for distances between places.
- A growing plant is best tracked in cm over several days to see clear day-to-day change.
Common Mistake to Avoid
Mixing up which unit is bigger — remember a kilometre is 1000 times a metre, and a metre is 100 times a centimetre, not the other way round.
Frequently Asked Questions
How do you choose the right unit for a measurement?
Pick the smallest unit that avoids very large or very small numbers — cm for a book, m for a room, km for a journey.
Why estimate a length before measuring it exactly?
It builds a practical sense of scale and immediately flags a measuring mistake if the actual result is very different from the guess.
Full walkthrough: Chapter 5 Solutions · Extra Questions.
