Class 3 Maths

CBSE Note For Class 3 Maths Mela Chapter 5 Fun With Shapes

Let us Do

Question 1. Make Amma’s rangoli on the dots given below.

Question 2. Name the shapes drawn in Amma’s rangoli:

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Question 3. How many shapes are made with __________

1. Curved lines _______
2. Straight lines __________

Question 4. Use shapes and objects from the classroom to make a rangoli design. Outline the object and color.

Question 5. Try to make the following objects using shape cutouts.

Let Us Do

Question 1. Collect some cardboard boxes and open them. What shapes do you see in the flattened boxes?

Question 2. Make an Envelope. Use a square piece of paper and fold it as shown in the picture.

Baking Biscuits

Why did the two children get different shapes? Discuss.

Name any three objects that have rectangular faces.

Let Us Do

Question 1. Trace all the faces of any cuboidal object. (example — sharpener or eraser)

1. How many different faces did you get? ______
2. What shapes are these faces? _________
3. Did you get a square? __________
4. Can you get six different rectangles, by tracing a cuboid? ________
5. Can a cuboid have a face like a triangle? __________
6. The faces of a cuboid are __________ or __________ in shape.

Question 2. Construct the rectangles using the sides given below:

Question 3. Draw 3 bigger rectangles around this small rectangle.

Question 4. Count and write the number of rectangles in the following picture.

Question 5. Look at the different rectangles given below and answer the following questions.

1. How many sides are there in a rectangle? __________
2. How many corners are there in a rectangle? __________
3. Are there any sides in a rectangle that are equal in length to each other? __________
4. What do you notice in a rectangle? Describe it in your own words.

Same To The Same

Question 1. Both have ______ sides

Question 2. Both have ______ Corners.

How many squares do you see in this drawing?

Let Us Do

Question 1. Here is a square. Draw 2 bigger squares around this square.

Question 2. Use matchsticks to make a square so that it has squares on all its sides. How many squares did you get?

Question 3. Complete the squares using the sides given below.

Question 4. Use the square cutouts from the book to do this activity. How many different shapes can you make by joining

1. 2 squares
2. 3 squares
3. 4 squares

Show them in a dot grid. Some dot grids are provided in the back of the book.

Let Us Explore

Question 1. Tick (✓) the shapes that are rectangles.

Which figures are not rectangles? Explain why.

Question 2. Can you fold all the comers of a square sheet in such a way that the number of comers remains the same?

Question 3. Make a square on a cardboard sheet and cut along the dotted lines marked on the square as shown to get 4 triangles. Make as many different shapes as possible by joining three triangles together. How many shapes can you make?

Now try with four triangles together.

Square Corners

Are the comers of a square the same? __________

How do you know?

Pile up some squares over one another and see.

Are the comers of a rectangle the same?

How do you know?

Pile up some rectangles over one another and see.

Are the corners of a square and a rectangle the same?

Name some objects in your class that have only square comers.

Let Us Do

You can join two paper strips to show different comers.

Use the strips to show a square comer, more than a square comer, and less than a square corner.

Can you use the strip to check whether the corners of your table and the board are square?

Question 1. Mark the square comers in these shapes.

Question 2. Connect the dots to make some squares. How many different squares did you get?

Question 3. Look at the picture given below and answer the following.

1. Count and write the number of corners.
2. Circle the square corners.

Question 4. Use two matchsticks to make two square corners and then four square corners. Draw and show it in the space given below:

Question 5. Murugan made three squares with 10 matchsticks. How many squares can you make with 12 matchsticks?

Triangle – Triangle …So many Triangles

Let Us Do

Question 1. Draw and name some triangular objects, that you see around you, in your notebook.

Question 2. Count the number of triangles in the given rangoli.

Question 3. How many different triangles can be made using the dots on this circle?

Question 4. Move two matchsticks to turn one triangle into two triangles.

Circus With Circles

Let Us Discuss

Question 1. Have you been to a circus?

Question 2. What does a circle look like? How is a circle different from a rectangle?

Let Us Do

Question 1. Name some objects that are like circles.

Question 2. Draw colorful circles to complete the circus scene.

Question 3. Draw circles by tracing bottle caps, bangles, and rings in your notebook.

Children are playing a game. They have made a circle on the ground. Have you played any game where you need to draw a circle? ______

Try to make a circle on the playground.

Let’s take a paper plate and fold it in half the way the children did.

The point where the lines meet is the center of the circle.

Make some puppets using circular shapes and play with them.

Let Us Do

Question 1. Look at these two shapes and discuss their similarities and differences. Tick (✓) the appropriate word.

Question 2. Choose any pair of shapes. Share the similarities and differences in these shapes with your friends.

Question 3. Find the largest rectangle in these shapes.

Question 4. I made one triangle. Then I made another row of triangles.

How many triangles are there in the second figure?

If I make one more row, how many triangles will be there in the third figure?

Question 5. Here are some rectangles that are tom. How many square pieces have been tom from each shape?

Question 6. Each of these shapes can be the odd one out.

How is each one added? Discuss.

Question 7. To complete the rectangle, tick() the appropriate shapes from the left side to fill the gaps in the shape on the right side.

Question 8. Draw two lines to split the shape into three triangles.

Question 9. Draw one lane, to split the shape into 3 triangles.

Question 10. Make the following shapes with different sizes and orientations (angular positions) in your notebook.

1. Triangle
2. Rectangle
3. Circle
4. Other shapes

Doors-Dots-Lines

Try to make your own border designs using both curved and straight limes.

Continue the following line pattern.

Tangram

Use the pieces from the tangram puzzle given at the end of the book. Can you create these shapes using some of the pieces?

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.

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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.

1. Oranges: _________
2. Bangles: _________
3. Laddoos: _________
4. Barfi: _________
5. Bindis: _________
6. 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:

1. Which number will you reach if you take the ladder from 13?
2. If you are on the snake at number 25, which number will you reach?
3. You are standing on 96. Which number on the die will take you to the snake’s mouth?
4. 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.

1. Place an arrow on 125.
2. Make a tree on 112.
3. Make a smiley on 149.
4. 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).

Let’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.

1. Use matchsticks bundles to make 125.
2. Make 145 using a glade.
3. 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

CBSE Notes For Class 3 Maths Mela Chapter 1 What’s In A Name?

A long long time ago, there was a cowherd family in Tarakeshwar. Every day Deba and Deep took the cows out for grazing. They used to return in the late evening together with all the cows.

One day, Deba asked: How do we know that we have not lost any cows? They did not know how to count.

What could Deba and Deep do?

Their friend gave them an idea: When you go out, make a mark on the wall for each cow that leaves the gate. Then when you come back, strike out one mark from the wall each time a cow re-enters the gate.

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The next day they followed their friend’s idea, and all the marks were struck out when they came back home.

Did all the cows come back home?

After a few years, they had many more cows. One day, their wall had this many marks when they left home.

So, they had….cows.

The next day they returned with the cows. They struck out one mark as each cow re-entered the gate. Two marks were still left on the wall but they didn’t see any cows outside. They were worried.

Why were Deba and Deep worried?

How many cows had reached home?

Deba and Deep quickly went to search for the missing cows and found them in a nearby field. They all happily returned home together!

Their friend Hemant had 36 cows and 23 sheep.

Help Hemant keep track of his cows and sheep by making marks like Deba and Deep.

Let Us Do

Question 1. Some animals and birds got together to play a game. They wanted to make 2 teams. They decided that the captain of the first team would be the one with the longest name, i.e., the one with the most letters. The captain of the second team will be the one with the shortest name, i.e., the one with the fewest letters.

Find out the captains of the 2 teams.

Question 2. Who has a longer name? Discuss.

Question 3. Write down the names of some of your friends in the spaces given below and then answer the questions from a to f.

1. Tick the longest name(s) and cross the shortest name(s).
2. Write the starting letter of your name. ___________
3. Count all the name(s) that have the same starting letter as yours. ___________
4. Which starting letter is the most used? Count the names that begin with it. __________
5. Count the names with the same ending letter. ________
6. Write the letters that are not the starting letters of any name. __________.

Question 4. Teji and Jojo are making numbers using these cards.

1. Write your roll number using number cards as shown above. Number cards are given at the end of the book.
   • My roll number is
   • Its number name has letters.
2. Write some numbers and their number names in your notebook. How many letters does each have?

Let Us Think

Let Us Do

Question 1. Write the number(s) between 1 and 99 that have the longest name.

Question 2. Make similar puzzles of your own in your notebook and ask your classmates.

Venkatanarasimharajuvaripeta is the place in India with the longest name. It is located in Andhra Pradesh, close to the border of Tamil Nadu.

Ib in Odisha and Od in Gujarat are the places in India with the shortest names.

Teji and Jojo have some picture cards. Teji has put these into two groups like this:

She has grouped the cards into “those that eat food” and “those that don’t eat food’. Jojo Gas arranged the same cards differently.

What is common in each of the groups Jojo has made?

Given below are pictures of some household objects.

Write the names of the above objects in the groups given below.

Group the objects given above differently. Write them down in the space below.

Let us Do

Hair Styles

Mala is going to school. Her mother has combed her hair, Mala has two ponytails.

Look at the children in your class.

All children comb their hair in different ways.

Look and write down.

CBSE Notes For Class 3 Maths Mela Chapter 4 Vacation With My Nani Maa

Can you tell me what the trick is?

Let Us Do

Perform the trick on your friends. Write the numbers of hidden seeds in the table below.

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7 Balushahi – 5 Balushahi = _________ Balushahi

Chirag got 9 story books for Nani Maa and Nandini got 7 puzzle books for Nani Maa. How many total books did the children get for Nani Maa?

Let Us Do

Use the tens frame to solve the following.

1. 6+8 = ________
2. 5+10 = _________
3. 9-6 = _______
4. 18-9 = _________

Let Us Play

Make four sets of number cards with numbers 1 to 10. Shuffle and spread out all cards facing down. Take turns with your friends to open one card at a time. When you open look at your card, and the cards are already opened.

If any three cards make an addition or a subtraction statement, you can keep all three cards. Else, put it down and opened. For example, Nandini opens 4. Numbers 2 and 6 have already been opened. So Nandini can keep all three cards 2, 4, and 6. The game continues till all cards are opened. Whoever collects the greatest number of cards wins the game.

Nandini and Chirag have got their stamps to show to their friends and Nani Maa.

How many stamps do they have now?

Nandini, Chirag, and Nani Maa figured out the answer in three different ways using their inlaid:

Let Us Do

Nandini and Chirag have 22 stamps. Nani Maa’s brother gives them his collection of 30 stamps. How many stamps do they have now?

They now have 52 stamps. Nandini and Chirag counted and found that they have 37 stamps with faces of famous persons and the remaining with pictures of monuments.

How many stamps with pictures of monuments do they have?

How many more stamps will they need? Figure it out using the number line.

Let Us Do

Question 1. Solve using a ginaladi.

1. 34+6
2. 23+12
3. 33-5
4. 42-15

Question 2. A frog is jumping on the ginladi. He is at 7. He wants to jump 10 beads at a time. mark the beads that he will jump on and write the numbers.

Question 3. The frog again jumps forward by 10 each time. Mark all the places where the frog will land.

Question 4. The grasshopper jumps backward by 10 each time. Mark all the beads that the grasshopper will jump on and write numbers.

Some ants are carrying big leaves to their homes. They will eat these leaves in the rainy season. Nani Maa can tell how many ants there are without looking under the leaves. Can you also tell me how many ants are under the leaves? Fill in the answers in the boxes provided.

Question 5. Fill in the tables by jumping as instructed.

Let Us Play

Adding and Subtracting Smartly with the Number Grid

Let us play a grid game. Each player takes turns rolling two dice to make a two-digit number and moves the counter by the number they have made. They can choose to move forward or backward. The first to reach a number between 91 and 100 is the winner!

Question 1. Use the number grid to answer the following. Show your thinking by drawing arrows in the grid.

1. Nandini is at 45. She gets 34. She will land on ________.
2. Chirag is at 75. He gets 56. He will land on _________.
3. Nandini is at 30. She gets 66. She will land on __________.
4. Chirag is at 89. He gets 63. He will land on ___________.

Magic Sums

Nandini and Chirag find some puzzles that Nani Maa has solved.

Observe the numbers. What do you notice?

Fill in the boxes below. In each puzzle, all numbers 1-9 are there. The numbers in each row add up to the number in the box on the right. The numbers in each column add up to the number in the box below.

Add the numbers in the blue boxes and the numbers in the red boxes in each of the puzzles. What do you find?

Nani Maa was doing something in the newspaper. Nandini and Chirag looked into what she was doing.

Magic magic magic!!!
With numbers1 to 9
Add the numbers in a line
From left to right
And from top to bottom
Didyoufind the magic?
Now, try from right to left
And from bottom to top
Isn’t it magical?
There is something more,
something more
Add the numbers on the diagonal
Isn’t it magical?

Fill in the blanks to complete the magic square

Nandini and Chirag went to their Nani Maa’s field. Nani Maa has two fields.

Nani Maa has plucked 25 red radishes and 36 white radishes. How many total radishes has she plucked?

Nandini starts by drawing the problem on the ground.

We need to add 25 and 36 to find the total number of radishes.

Nani Man puts tomatoes and carrots in a box and writes 100 on it.

Circle the bundle of sticks that shows the correct number of carrots.

Solve the above problem on the number line.

Nani Maa asks Nandini and Chirag to pluck the ripe apples. Woho! so many of them.

Try finding out the answer on the number line below.

Who collected more, Nandini or Chirag? How much more?

Chirag draws a box diagram for the problem.

Solve the following problems by first drawing the box diagrams, Use matchstick bundles or a number line to find the answer.

1. Babli didi sold 34 books on Monday and 45 books on Tuesday. How many books did she sell in the two days? How many more did she sell on Tuesday than on Monday?
2. In a cricket match at Rosary School, Team Red made 56 runs before lunch and 65 runs after lunch. How many total runs did they make?
3. Rama sells vadas in the school canteen. She has sold 39 vadas on the first day. She sold 12 more the next day. How many vadas did she sell in these two days?
4. Gehu brings 56 plants for her terrace garden. Some plants dried up. She is left with 29 plants. How many plants dried up?
5. Choose two numbers. Make a word problem using the two numbers. Share it with your classmates.

Let Us Play

This game is to be played between two children. The first player should say a number between 1 and 10. The second player adds a number between 1 and 10 to the first player’s number. The first player again adds a number between 1 and 10 to the previous sum. The player to reach 100 first is the winner. An example is given here:

Player 1 wins this round!

Play this game with your friends.

Let Uo Do

Question 1. Estimate the answer and say if it will be more or less than 100. Match with the correct one.

Question 2. Solve the above problems using a number line. Write the answer next to the problem.

CBSE Notes For Class 3 Maths Chapter 2 Toy Joy

Some children are making animal and bird faces on old boxes, cans, and paper.

Let Us Do

Use old boxes (cubes and cuboids) and bottles (cylinders) to do craft work. Draw faces on them. What did you draw on their faces?

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• Jaya is building a rocket with her shapes. What shapes has she used?
• How many of each?

Cube: _________ Cuboid: _________

Cone: _________ Cylinder: _________

• What shape is between the red cuboid and the yellow cuboid?
• What shape is on the top of the orange cylinder?
• What shape is under the pink cone?

Collect objects to make a house. Name the shapes and talk about their faces and edges. Which are straight and which are curved? Also, describe how the shapes have been arranged. What part of the shapes can you see from a distance?

Devika went to a shop and bought a toy engine.

Here is Devika’s toy engine. It has many parts. Count and fill.

______ red cylinder(s) _________ yellow cone(s)

______ grey cuboid(s) _________ blue cube(s)

Let Us Discuss

Here are some more toys from the toy shop. They are made up of different shapes.

What shapes are used in these toys?

Jaya made some houses using different shapes.

Try to build such houses, towers, rockets, etc. using different shapes available around you.

Note that a cube is a special type of cuboid.

Let Us Play

Construct And Describe

Ask students to sit in groups of four or five. In each group, one student selects any three shapes and puts them together. The student, then describes the sequence of construction and the other students have to build the same without seeing the original one. Let children take turns and play the game in the group.

Example

The cylinder is on top of the cuboid. The cone is on top of the cylinder.

Let Us Do

Question 1. Can you find these shapes in the classroom? Fill in the table with their names.

1. Name the shape that you find the most. ________
2. Name the shape that you find the least. ________
3. Name the objects that are made up of more than one shape. _______

Question 2. Look at these shapes and answer the following questions.

• Circle the cubes.
• Put a tick against the shapes that are cones.
• Put a cross against the shapes that are cones.
• Put a box around the cuboids.

Question 3. Name the shapes

• with no edges. __________
• with only flat faces. _________
• with only curved faces. ________
• with both straight and curved edges. _________
• with both flat and curved faces. _________

Question 4. Which shapes can you build?

Question 5. Try to make these shapes using cubes.

Let Us Play

There is a game along the border of this page. Roll the die and move the counter to the next picture associated with the number on the die (if possible without crossing the “Finish” square) and play the game with your friends. The one who reaches the finish mark first wins the game.

Question 6. In what ways are these shapes the same? In What ways are they different?

Question 7. Look at a die. The faces have 1 to 6 dots. What number is on:

• The face opposite number 1? __________
• The face opposite number 2? __________
• The face opposite number 3? __________
• What pattern do you notice? ___________

Question 8. In what order is this model built?

Question 9. In how many different ways can you join 3 cubes? try and see.

Question 10. Name the shapes used in these models. Describe how the shapes are arranged to make them.

Question 11. Use six dice to make the following shapes:

1. A Cuboid
2. A tower
3. Any other shape of your choice