NCERT Textbook: Double Century

# NCERT Textbook: Double Century | Mathematics for Class 3 (Maths Mela) PDF Download

``` Page 1

1.  Look at the picture. Estimate
and write the number of each
of the following objects.
a. Oranges : ................
b. Bangles : ................
d. Barfi : ................
e. Bindis : ................
f. Bananas : ................
3 3
Double Century Double Century
Let us Do
The STory of our Number S
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.
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 really 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.
Page 2

1.  Look at the picture. Estimate
and write the number of each
of the following objects.
a. Oranges : ................
b. Bangles : ................
d. Barfi : ................
e. Bindis : ................
f. Bananas : ................
3 3
Double Century Double Century
Let us Do
The STory of our Number S
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.
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 really 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.
17
Double Century
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. ...................
Fill the missing numbers on the board.
END
98 97 92
1 2 3 5 7
11
21 22 25 26 28
29
30
32
36
37 39
41
42
45 48 49
51
61 62 64 68 69
72 75
76
79
84
85
54
55 58
19 18 15
13
12
9

Let us Play
Page 3

1.  Look at the picture. Estimate
and write the number of each
of the following objects.
a. Oranges : ................
b. Bangles : ................
d. Barfi : ................
e. Bindis : ................
f. Bananas : ................
3 3
Double Century Double Century
Let us Do
The STory of our Number S
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.
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 really 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.
17
Double Century
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. ...................
Fill the missing numbers on the board.
END
98 97 92
1 2 3 5 7
11
21 22 25 26 28
29
30
32
36
37 39
41
42
45 48 49
51
61 62 64 68 69
72 75
76
79
84
85
54
55 58
19 18 15
13
12
9

Let us Play
18
Maths Mela | Class 3
Teacher’s Note: Encourage children to represent numbers with
matchsticks in the form of bundles and loose sticks.
I said 42, Pot
said 43
I am a talking Pot.
Tell me any number, and
I will tell you the next.
I said 39, Pot
said ........
I said ......, Pot
said 90
I said 99, Pot
said 100
I said ......, Pot
said........
I said 63, Pot
said ........
and one more    makes 100.
One more than 99 is 100.
10 bundles of 10 sticks each
is 100 sticks
What is
100?
Oh, he scored a century.
That is a 100 runs

10 Packets of 10 bindis each
makes 100.
Let Us Think
Let us Think
Page 4

1.  Look at the picture. Estimate
and write the number of each
of the following objects.
a. Oranges : ................
b. Bangles : ................
d. Barfi : ................
e. Bindis : ................
f. Bananas : ................
3 3
Double Century Double Century
Let us Do
The STory of our Number S
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.
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 really 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.
17
Double Century
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. ...................
Fill the missing numbers on the board.
END
98 97 92
1 2 3 5 7
11
21 22 25 26 28
29
30
32
36
37 39
41
42
45 48 49
51
61 62 64 68 69
72 75
76
79
84
85
54
55 58
19 18 15
13
12
9

Let us Play
18
Maths Mela | Class 3
Teacher’s Note: Encourage children to represent numbers with
matchsticks in the form of bundles and loose sticks.
I said 42, Pot
said 43
I am a talking Pot.
Tell me any number, and
I will tell you the next.
I said 39, Pot
said ........
I said ......, Pot
said 90
I said 99, Pot
said 100
I said ......, Pot
said........
I said 63, Pot
said ........
and one more    makes 100.
One more than 99 is 100.
10 bundles of 10 sticks each
is 100 sticks
What is
100?
Oh, he scored a century.
That is a 100 runs

10 Packets of 10 bindis each
makes 100.
Let Us Think
Let us Think
19
Double Century
1. Fill in the blanks.
Bholu made 100 by jumping on 65 and jumped 35 more.
Make 100 by different jumps on this number line.
2.  Use matchstick bundles and a ginladi to make 100 in different
ways. Fill the table below.
60 and 40 makes .............. 45 and ............. makes 100.
............. and 25 makes 100. ............. and 85 makes 100.
............. and ............. makes 100. ............. and ............. makes 100.
Making 100 Number sentence

70 and 30 makes 100
__ and __ makes 100
__ and __ makes 100
0 10 20 30 40 50 60 70 80 90 100
0 10 20 30 40 50 60 70 80 90 100
65
65
35
35
These beads are also 100 in number.
Let us Do
Page 5

1.  Look at the picture. Estimate
and write the number of each
of the following objects.
a. Oranges : ................
b. Bangles : ................
d. Barfi : ................
e. Bindis : ................
f. Bananas : ................
3 3
Double Century Double Century
Let us Do
The STory of our Number S
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.
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 really 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.
17
Double Century
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. ...................
Fill the missing numbers on the board.
END
98 97 92
1 2 3 5 7
11
21 22 25 26 28
29
30
32
36
37 39
41
42
45 48 49
51
61 62 64 68 69
72 75
76
79
84
85
54
55 58
19 18 15
13
12
9

Let us Play
18
Maths Mela | Class 3
Teacher’s Note: Encourage children to represent numbers with
matchsticks in the form of bundles and loose sticks.
I said 42, Pot
said 43
I am a talking Pot.
Tell me any number, and
I will tell you the next.
I said 39, Pot
said ........
I said ......, Pot
said 90
I said 99, Pot
said 100
I said ......, Pot
said........
I said 63, Pot
said ........
and one more    makes 100.
One more than 99 is 100.
10 bundles of 10 sticks each
is 100 sticks
What is
100?
Oh, he scored a century.
That is a 100 runs

10 Packets of 10 bindis each
makes 100.
Let Us Think
Let us Think
19
Double Century
1. Fill in the blanks.
Bholu made 100 by jumping on 65 and jumped 35 more.
Make 100 by different jumps on this number line.
2.  Use matchstick bundles and a ginladi to make 100 in different
ways. Fill the table below.
60 and 40 makes .............. 45 and ............. makes 100.
............. and 25 makes 100. ............. and 85 makes 100.
............. and ............. makes 100. ............. and ............. makes 100.
Making 100 Number sentence

70 and 30 makes 100
__ and __ makes 100
__ and __ makes 100
0 10 20 30 40 50 60 70 80 90 100
0 10 20 30 40 50 60 70 80 90 100
65
65
35
35
These beads are also 100 in number.
Let us Do
20
Maths Mela | Class 3
3.	 	 Write 	numbers	in 	 the 	 blank 	 spaces 	inside	 the 	 flower 	 petals 	 so
that the numbers in each petal add up to 100.
How many are 100?
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.
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.
...... + ......
...... + ......
...... + ......
...... + ......
...... + ......
...... + ......
45
30
37
60
55
81
25
100
...... + ......
...... + ......
...... + ......
...... + ......
...... + ......
...... + ......
9 91
0
100
Let Us Think
Let us Explore
```

## Mathematics for Class 3 (Maths Mela)

6 videos|68 docs|18 tests

## Mathematics for Class 3 (Maths Mela)

6 videos|68 docs|18 tests

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