NCERT Class 4 Mathematics Math-Mela: Chapter 6 — Measuring Length
This chapter, "Measuring Length" from NCERT's Class 4 Mathematics Math-Mela, introduces students to the concept of measurement. It begins with an observation activity where students identify what is being measured in a picture, distinguishing between length, height, breadth, and depth. The chapter revisits the unit of metre, previously studied in Grade 3, and prompts students to assess lengths in their classroom relative to a metre. It emphasizes that terms like 'tall', 'wide', 'short', and 'long' all refer to length measurements. Practical activities involve making and using metre, half-metre, and quarter-metre ropes to understand length relationships. Students also engage in activities like walking, jumping, and crawling on 1m, 5m, and 10m lines to develop an estimation of these distances. This chapter aims to build a foundational understanding of length measurement and estimation skills crucial for CBSE mathematics learning.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 4 |
| Subject | Mathematics |
| Book | Math-Mela |
| Chapter | Chapter 6 — Measuring Length |
| Language | English |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 3 minutes |
| Word count | 428 |
Learning outcomes
- Identify different aspects of length measurement (height, breadth, depth).
- Understand that metres are used to measure length.
- Relate classroom objects' lengths to one metre.
- Understand that 'tall', 'wide', 'short', and 'long' all denote length.
- Develop an estimation of 1m, 5m, and 10m distances.
- Understand basic length relationships (e.g., 1m = 2 x 0.5m).
Vocabulary
| Word | Meaning |
|---|---|
| Length | The measurement of how long something is. |
| Height | The measurement from bottom to top. |
| Breadth | The measurement from side to side; width. |
| Depth | The measurement from the front to the back. |
| Metre | A standard unit for measuring length. |
| Half metre | Half of a metre (0.5 m). |
| Quarter metre | One fourth of a metre (0.25 m). |
| Estimate | To form an approximate judgment or calculation of size or quantity. |
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Practice questions
- Which of these is a unit for measuring length? Answer: Metre
- Is the height of a door usually more or less than a metre? Answer: More than a metre
- If 1 metre is equal to two half metres, how many quarter metres make 1 metre? Answer: Four quarter metres
- What is the difference between height and breadth? Answer: Height is measured from bottom to top, while breadth is measured from side to side (width).
Frequently asked questions
What is the main topic of NCERT Class 4 Mathematics Math-Mela Chapter 1?
Chapter 1 focuses on 'Measuring Length', introducing basic concepts and units of length measurement.
What units of length are discussed in this chapter?
The chapter primarily discusses the 'metre' and its fractions like half metre and quarter metre.
What practical activities are included in the chapter?
Students are encouraged to make and use measurement ropes and perform activities like walking, jumping, and crawling on lines of different lengths (1m, 5m, 10m).
How does this chapter help students in their CBSE studies?
It builds foundational skills in measurement and estimation, which are essential for various mathematical concepts in CBSE curriculum.
What is the purpose of the 'Let Us Observe' section?
It helps students identify what aspects of an object are measured (like length, height, breadth) and to distinguish them from other measurements like weight or temperature.
Related resources
Important topics
Topics covered
NCERT Class 4 Mathematics — Math-Mela — Chapter 6 — Measuring Length. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.