Chapter 7 of Class 1 Joyful Mathematics, Lina’s Family, introduces measurement through comparing family members — height, distance, and weight — using simple, non-standard tools.
Key Concepts
Comparing height: tallest = the person with the maximum height in a group; shortest = the minimum height.
Comparing distance: nearest = shortest distance; farthest = greatest distance.
Non-standard measuring tools: a handspan (thumb tip to smallest-finger tip when the hand is stretched out) used to measure things like a table or book.
Quick Recap
- Before using rulers, children learn to compare and measure using their own body — handspans and finger-widths.
- “Tallest” and “shortest” always compare within a specific group, not against an absolute standard.
Common Mistake to Avoid
Using a different-sized handspan each time — for a fair comparison, the same person’s hand (or an agreed unit) should be used throughout one measurement.
Frequently Asked Questions
Why use handspans instead of a ruler in Class 1?
It builds the underlying idea of measurement (comparing length using a repeated unit) using the body, before introducing standard units like centimetres later.
How can this be practised at home?
Measure a few household items using handspans, and compare family members’ heights to decide who is tallest and shortest.
Full walkthrough: Chapter 7 Solutions · Extra Questions.
