Class 3 Exam  >  Class 3 Notes  >  Mathematics for Class 3 (Maths Mela)  >  Chapter Notes: Fun at Class Party

Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela) PDF Download

Introduction

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!

Let's Understand With a Story

  • Once there were two friends, Riya and Aryan. They loved playing cricket. One day, they wanted to know how long their cricket bat was.
    Riya & Aryan
    Riya & Aryan
  • Aryan tried to measure it using his hands and said it was 4 hand lengths long. 
  • Then, Riya tried and said it was 6 hand lengths long for her.
    Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)
  • They were confused why the bat was different lengths for each of them. 
  • Their mom explained, "Your hands are different sizes, so using hand length isn't a good way to measure. You should use a ruler or a measuring tape. They give the same answer for everyone."
    Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)
  • Riya and Aryan understood and learned that using the right tools helps us measure things correctly. 
  • From that day on, they always used a ruler or measuring tape to measure things accurately.Ruler & Measuring Tape
    Ruler & Measuring Tape
    Now that we know why and how measurement is important, let's understand different types of measurements.

Measurement of Length - "How long?"

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 hand span is the distance from the tip of the thumb to the tip of the little finger when the fingers are spread apart.
  • A cubit is the distance from the elbow to the tip of the middle finger when the hand is stretched out.

Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)But here's the thing: everyone's hand span and cubit are different like we saw in the story given above.
So when they measure something, they don't always get the same answer. That's why mathematicians decided to create standard units of length.Foot ScaleFoot Scale

  • In many parts of the world, people used units like inches, feet, and yards. 
  • 12 inches make one foot and  3 feet (plural of foot) make 1 yard.
  • But now, we mostly use the Metric system. 
  • The standard unit for measuring length is called a meter, and we write it as 'm'. 
  • Longer distances are measured in kilometers (km), and smaller lengths in centimeters (cm).

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 Meter rod,
  •  a Measuring tape
  • and a Ruler.

Different tools for Measuring Lengths

A cloth merchant measures cloth by iron rod called the meter rod.
Metre RodMetre Rod

15 cm Ruler15 cm Ruler

Here, the distance from the floor to a door knob is about 1 meter and the height of the plant is also about 1 meter.
Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)There are certain things such as the following that are more than a meter long.
Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)There are certain things like those shown below that are less than a meter long.
Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)We use meter to measure long length and centimeter to measure short length.

Measurement of Length Using Centimeter Scale

Your finger is about 1 centimeter wide.
Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)This will help you to estimate length in centimeter. A 15 cm or 30 cm ruler is used to measure lengths in centimeter.
To measure the length of an object, say, a sharpener, line up one of the sharpener end at the 0 mark of the ruler. The other end, touches the 2 cm mark of the ruler, so it is 2 cm long.
Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)Similarly, we can measure the length of the following objectsFun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)

  • The length of the pencil is 12 cm.
  • The length of the crayon is 6 cm.
  • The length of the board pin is 1 cm. 


    Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)

Measuring Distances - "How far?"

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, feet, km to measure the length or distance between two points.

Long distances measured using kilometers that is represented by km.

Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)

Measuring Heights - "How Tall?"

"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.

Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)

Story Time: How tall we are?

Once upon a time in a park, there were boxes of flowers piled up high, forming a huge tower. 

Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)

  • All the kids gathered around to see how tall they were compared to the tower. 
  • Rajat stood next to the tower and found out he was 4 boxes tall.
    Rajat is 4 boxes tall
    Rajat is 4 boxes tall
  • Richa then stood beside Rajat and discovered she was 5 boxes tall. 
    Richa is 5 boxes tall
    Richa is 5 boxes tall
  • Finally, Disha joined them and realized she was 3 boxes tall.
    Disha is 3 boxes tall
    Disha is 3 boxes tall
  • The kids were amazed to see how the tower helped them understand their heights in a fun way. 
  • They learned that comparing our height to something else, like a tower or a tree, can show us how high or tall we are.

Let's Practice

1. Look at the picture of the flower below.  Can you guess the height of the flower with the help of the ruler given:Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)

Sol: On closely looking at the picture, we get to know that the height of the flower is 6cm.Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)

2. Upon looking at the following image, can you tell which one of the following kid is taller?Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela)

Sol: It can clearly be seen that the boy is taller than the girl.

In Summary, Measurement helps us find out how long, heavy, or full something is. We use units like centimeters (cm), meters (m), and liters (L) to measure length, capacity. Simple tools like rulers, weighing scales, and measuring cups help us measure things around us accurately.

The document Fun at Class Party Chapter Notes | Mathematics for Class 3 (Maths Mela) is a part of the Class 3 Course Mathematics for Class 3 (Maths Mela).
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FAQs on Fun at Class Party Chapter Notes - Mathematics for Class 3 (Maths Mela)

1. What are the different tools used for measuring lengths?
Ans. The different tools used for measuring lengths include rulers, measuring tapes, yardsticks, and meter sticks. Each tool has its own specific use, such as a ruler for small lengths and a measuring tape for longer distances.
2. How do we measure distances accurately?
Ans. To measure distances accurately, we can use tools like measuring tapes, odometers, or even GPS devices. It's important to ensure the tool is straight and correctly aligned with the starting and ending points to get an accurate measurement.
3. Why is it important to measure lengths and distances in everyday life?
Ans. Measuring lengths and distances is important in everyday life for various reasons such as construction, crafting, and even cooking. Accurate measurements help ensure that things fit well or that recipes turn out correctly.
4. What units are commonly used to measure length?
Ans. Common units used to measure length include centimeters, meters, inches, and feet. The choice of unit often depends on the context in which the measurement is being taken.
5. How can we practice measuring lengths and distances at home?
Ans. We can practice measuring lengths and distances at home by using a ruler or measuring tape to measure furniture, books, or even our own height. We can also measure distances by walking and counting steps, then comparing it to actual measurements.
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