Table of contents  
Introduction  
Let's Understand With a Story  
Measurement of Length  "How long?"  
Different tools for Measuring Lengths  
Measuring Distances  "How far?"  
Let's Practice 
Imagine a world full of measuring tools and colorful adventures! In this chapter, we'll learn how to measure using our hands, feet, and special tools like metre ropes. Get ready to compare lengths, guess distances, and have a blast as we explore the exciting world of measurement together!
Have you ever wondered how people measured things long ago? They didn't have rulers like we do now. Instead, they used parts of their bodies! Here are some of the parts they used:
A cubit is the distance from the elbow to the tip of the middle finger when the hand is stretched out.But here's the thing: everyone's hand span and cubit are different like we saw in the story given above.
So when they measured something, they didn't always get the same answer. That's why mathematicians decided to create standard units of length.Foot Scale
So, even though people used to measure with their hands and arms, now we use meters and centimeters to measure things accurately!
For measuring lengths, we use:
A cloth merchant measures cloth by iron rod called the metre rod.
Metre Rod
15 cm Ruler
Here, the distance from the floor to a door knob is about 1 metre and the height of the plant is also about 1 metre.
There are certain things such as the following that are more than a metre long.
There are certain things like those shown below that are less than a metre long.
We use metres to measure long lengths and centimetres to measure short lengths.
Your finger is about 1 centimetre wide.
This will help you to estimate lengths in centimetres.A 15 cm or 30 cm ruler is used to measure lengths in centimetres.
To measure the length of an object, say, a sharpener, line up one of the sharpener ends at the 0 mark of the ruler. The other end, touches the 2 cm mark of the ruler, so it is 2 cm long.
Similarly, we can measure the length of the following objects
Long distances measured using kilometres that is represented by km.
Measuring distance is like counting steps or jumps to find out how far things are from each other on a grid or map. We use units of distance, like meters or feet, to measure the length or distance between two points.
"How Tall?" is about measuring how high or tall something or someone is, like a tree or a person. We use units of measurement, like meters or feet, to find out the height from the ground to the top of the object or person.
Once upon a time in a park, there were boxes of flowers piled up high, forming a huge tower.
1. Look at the picture of the flower below. Can you guess the height of the flower with the help of the ruler given:
Sol: On closely looking at the picture, we get to know that the height of the flower is 6cm.
2. Upon looking at the following image, can you tell which one of the following kid is taller?
Sol: It can clearly be seen that the boy is taller than the girl.
6 videos68 docs18 tests

1. How can we measure length using different tools? 
2. What is the difference between measuring distances and measuring heights? 
3. How can we measure the length of an object accurately? 
4. Can you give an example of a reallife situation where measuring length is important? 
5. What are some common units of measurement used for length? 

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