## CBSE Notes For Class 3 Maths Mela Chapter 3 Double Century

**The Story Of Our Numbers**

Tens of thousands of years ago, people started counting. They wanted to keep records of their things. So they made marks on the walls of caves and on the barks of trees.

Over time, they kept records of their things by making groups of 5, 10, 20, and 60.

Thousands of years ago, the ancient Indians created a method for

writing any number, however large, using only ten symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. It was one of the most ingenious and creative inventions in human history. It made possible the invention of TVs, computers, mobile phones, and more. This method of writing numbers is now used everywhere in every country in the world.

**Read and Learn More CBSE Solutions For Class 3 Maths**

A very important part of this invention was the introduction and use of the symbol “0” to mean “nothing”. It is the number 0 that made this system of writing numerals work!

Over the next few months, we will learn how to write all numbers, however large, using just these ten symbols.

**Let Us Do**

**Question 1. Look at the picture. Estimate and write the number of each of the following objects.**

- Oranges: _________
- Bangles: _________
- Laddoos: _________
- Barfi: _________
- Bindis: _________
- Bananas: _________

**Answer:**

**Let Us Play**

**Fill in the missing numbers on the board.**

**Answer the following on the basis of the Snakes and Ladders board:**

- Which number will you reach if you take the ladder from 13?
- If you are on the snake at number 25, which number will you reach?
- You are standing on 96. Which number on the die will take you to the snake’s mouth?
- Show the number written on the tail of the longest snake using bundles and loose sticks. _____

**Let Us Think**

These beads are also 100 in number.

**Let Us Do**

**Question 1. Fill in the blanks.**

Bholu made 100 by jumping on 65 and then 35 more.

**Question 2. Use matchstick bundles and a glad to make 100 in different ways. Fill in the table below.**

**Question 3. Write numbers in the blank spaces inside the flower petals so that the numbers in each petal add up to 100.**

**Let Us Explore**

How many are 100?

**Question 1. Open a full box of matchsticks.**

- Estimate the number of matchsticks in the box: ________
- Count the number of matchsticks in the box: _________
- How close was your estimate?
- How many boxes of matchsticks will get the total close to 100 matchsticks? ________ boxes.

**Question 2. Take a handful of seeds like kidney beans, chickpeas, etc.**

- Estimate the number of seeds you have in your hand: ________
- Count the number of seeds in your hand: _________
- How many handfuls of seeds will get the total close to 100 seeds? ________ handfuls.

Fill in the blank spaces on the number line given at the edge of the page.

**Let Us Do**

**Question 1. Let’s continue making numbers above 100 using matchsticks bundles and loose sticks.**

In the table given proxy. identify the bundles and loose sticks and write the corresponding numbers.

Extend the table in your notebook to 150. Do you observe something common in all the numbers?

**Match the number with the correct bundles and loose sticks.**

Oh! Talking Pot is back. It will say one more than whatever you say.

**Fill in the blank spaces on the number line.**

**Show the following numbers on the number line below.**

- Place an arrow on 125.
- Make a tree on 112.
- Make a smiley on 149.
- Put a cross on 137.

**Let Us Play**

Play this game in two teams. One team will show a number using clap, snap, and pat and the other team will guess it. Example: Clap- Snap Snap- Pat Pat Pat means 123 (One hundred and twenty-three).

**L****et’s now count beyond 150.**

Extend this table to 200 in your notebook How much is 200?

**Let Us Do At Home**

**Question 1. Fill a small container like a small bowl with seeds such as kidney beans, chickpeas, etc.**

**Question 2. Look closely at the container to estimate how many seeds are in it. Your Estimate: _______ seeds.**

**Question 3. Now count and see how close your estimation is to the actual number of seeds. Counted _____ seeds.**

**Question 4. Guess how many times you need to fill the container to get close to 200 seeds. Your guess: _____ time.**

**Write the numbers in order on the stones.**

**Let Us Do**

**Jumping Game**

**Question 1. Draw jumps of 5 on the number line and write the numbers on the number line in the given spaces.**

**Question 2. Continue jumps of 20 and write the missing numbers on the given number line.**

**Question 3. Fill in the table.**

**Question 4. Show at least two different ways of making the following numbers.**

- Use matchsticks bundles to make 125.
- Make 145 using a glade.
- Make 170 on a number line.

**Question 5. Fill in the empty boxes appropriately.**

**Question 6. Mark the following numbers on the number line.**

**1. 109, 112, 124, 134, 146**

**2. 155, 163, 178, 189, 198**

**3. 125, 142, 153, 174, 199**