2. Fun with Numbers

Some children in a garden collecting tamarind seeds.

Radhika - I have picked 24 seeds.

Gauri - Hurray! I got 47 seeds.

Sunil - Here are my 38 seeds.

Indra - I got 54 seeds.

Vickey - I think i have collected 42 seeds.

Radhika, Gauri, Vicky, Indra and Sunil were collecting Imli (tamarind) seeds.

_____ collected the most seeds.
Sunil will collect _____ more seeds to be equal to Vicky.
If Radhika gets 6 more seeds, she will have _____.
How many children have more than 40 seeds? _____
_____ needs 3 more seeds to have 50.
Sunil has 2 seeds less than 40 and _____ has 2 seeds more than 40.

Dot Game

Guess the number of dots in the circle. Now count and check your guess. Play this game with your friends by making circles. See who can guess best.

The picture has a deer and lady bird asking for the number of dots on them. There is a square with many dots and some dots are encircled.

Can you guess the number of dots on me?

And on me?

Children need interesting exercises to help them with visual estimation of numbers - of things arranged randomly and in symmetrical groups. Teachers could use other instances, such as bundles of leaves sold in the market, the school assembly, designs on mats, etc. to make them guess and estimate different numbers. In this book an ant has been used to show the child that a guess or estimate has to be made.

15

Dhoni's Century

One-day match between India and South Africa in Guwahati......., India batting first......

Commentators sitting in the commentary box and saying," Dhoni on 96... Only one ball left... will he complete his century?.. And look at this! What a marvellous six! Lady commentator asking," HAs he completed his century?"

Fill in the blanks:

Dhoni scored 96 +_____ = _____ runs.

How many runs do these players need to complete a century?

	Runs scored	Runs needed to complete a century
Player 1	93	_____
Player 2	97	_____
Player 3	89	_____
Player 4	99	_____

Numbers are understood not by reciting them in order but by making associations in familiar contexts. Here the idea of a "century" of runs is used. Teachers could add other examples from children's lives to think about 3-digit numbers. Encourage them to speak about large numbers even if they cannot read or write them.

A boy standing with a tree and saying, "After 99 we go on like this." A tortoise crossing Number 99 and moving towards 100. A crow sitting on number 102 and saying," See you tomorrow"

Fill in the Blanks:

99-112
Number (in figures)	Number (in words)
99	Ninety-nine
100	One hundred
101	One hundred one
102	_____
103	One hundred three
104	One hundred four
_____	One hundred five
106	One hundred six
107	_____
_____	One hundred eight
109	One hundred nine
110	One hundred ten
111	One hundred eleven
_____	One hundred twelve

195-206
Number (in figures)	Number in words
195	One hundred ninety-five
196	One hundred ninety-six
197	One hundred ninety-seven
198	One hundred ninety-eight
_____	One hundred ninety-nine
200	Two hundred
201	Two hundred one
_____	_____
203	Two hundred three
_____	Two hundred four
205	Two hundred five
206	_____

Oh! 206! Guess how many more to make a triple century?

Top Ten Scores in the Cricket World Cup

Player	Score
A.P.J	128
A.S.	100
C.K.	99
D.M.	162
K.S.P.	152
M.D.	178
P.K.	105
S.T.	141
T.P.K	112
V.V.S.	127

C.K. just missed his century. How many runs did he need to make a century? _____
_____ and _____ scored almost equal runs.
_____ scored a complete century, no less, no more.
Most runs scored by any batsman are _____.
_____ and _____ have a difference of just 1 run between them.
_____ scored 2 more than one and a half century.

Counting in 10’s

10
20
30
_____
_____
_____
_____
_____
_____
100

110

_____

190

200

310

_____

400

_____

720

_____

780

_____

A monkey hanging with a rope which has tags of 50 attached to it. An owl sitting on the tree and saying, " Count in fifty up in a jiffy."

Counting in 50's

200
250
_____
350
_____
_____
500
550
_____
650
_____
750
_____
850

How far can you go like this?

What is the biggest number you can call out? _____

Colour the Numbers

744	810	45	401	54
555	374	171	261	159
656	140	179	891	16
195	155	410	159	685
454	136	60	74	699
800	445	642	202	943

Find these numbers in the above chart. Colour them.

Green	Red	Yellow
One hundred forty	Fifty-four	Four hundred forty-five
Two hundred two	Sixty	Sixteen
Two hundred sixty-one	One hundred ninety-five	One hundred fifty-nine
Eight hundred	Five hundred fifty-five	Six hundred eighty-five
300 + 70 + 4	600 + 40 + 2	600 + 90 + 9
600 + 50 + 6	100 + 70 + 9	70 + 4
5 + 50 + 100	800 + 10	1 + 90 + 80

Jumping Animals

A snake has counting written in blocks on its body and a deer, a rabbit and a frog are jumping on numbers.

Gabru, Bunny and Tarru are jumping all the way. Gabru jumps on every 7th box, Bunny on every 5 th box, Tarru on every 4th box.

Gabru starts jumping from number 90.

Bunny starts jumping from number 99.

Tarru starts jumping from number 106.

Bunny’s tenth jump is on number _____.

Tarru’s tenth jump is on number _____.

Gabru’s tenth jump will be on number _____ .

Gabru and Bunny both jump on numbers 104, _____ and _____

Find out:

Tarru and Bunny jump on numbers _____, _____, _____, and _____.
Is there any number where all three of them jump? _____
Guess who will finish in the least jumps? In how many jumps? _____

Class, Jump!

Some children are jumping and a frog is saying," Long way to go!"

Jump 2 steps forward:

104, 106, 108, _____, _____, ______, _____.

Jump 2 steps backward:

262, 260, 258, _____, _____, ______, _____.

Jump 10 steps forward:

110, 120, 130, _____, _____, ______, _____.

A frog is sitting on a stone and saying, "Join In!" Jumping school is written on the stone.

Jump 10 steps backward:

200, 190, 180, _____, _____, ______, _____.

Continue the pattern:

550, 560, 570, _____, _____, ______, _____.

910, 920, 930, 940, _____, _____, ______, _____.

209, 207, 205, _____, _____, ______, _____.

401, 402, 403, _____, _____, ______, _____.

Lazy Crazy Shop

A shop with name Lazy Crazy and a signboard stating "We deal only in Hundreds Tens and Ones." A monkey is saying, " A bunch of 20 bananas please" and the shopkeeper, a wolf replies," sorry!"

This is the jungle shop. Lazy Crazy gives things only in packets of tens, hundreds and loose items.

Find out how many packets of tens, hundreds and loose items each animal will take. Fill in the blanks.

Packets of 100	Packets of 10	Loose items

_____	_____	_____
_____	_____	_____
_____	_____	_____

24

Lazy Crazy also has a crazy way of taking money. He takes only in A hundred rupee note. notes, A ten rupee note. notes and One rupee coin. coins. Now find out how they will pay him for what they have taken.

	Rs 420
	Rs 143
	Rs 242
	Rs 55

Who am I? Match with the number.

a)	I come between 40 and 50 and there is a 5 in my name.	96
b)	I have 9 in my name and am very close to 90.	150
c)	If you hit a 4 after me, you score a century.	45
d)	I am equal to ten notes of 10.	89
e)	I am century + half century	87
f)	I am exactly in between 77 and 97.	100

In this chapter several stories and exercises are used to help children understand the decimal number system. The term 'place value', which often confuses children, has not been used at all.

Teachers could also find out about other locally used number systems, if any, especially while working in tribal communities.

How Many are these?

Two 100 rupee notes and four 10 rupee notes.

_____ rupees

Three bunch of sticks with 100 each and a bunch of 10 sticks and some loose sticks.

_____ sticks

Two groups of 100 blocks each and a group of 10 blocks and two loose blocks.

_____ blocks

A big and three small necklaces of beads and some loose beads.

_____ beads

Three 100 rupee notes and two 10 rupee notes.

_____ rupees

Who am I? There is no biggest number Take any you can find Add me to get the next one To count, keep me in mind.

Chanda Mama and stars in the sky.

I am Chanda Mama. I have so many friends which twinkle in the sky. Yes, you are right! My friends are stars. One day all of them came to my home. I started counting to see how many friends had come. But my friends were too many. So to remember their numbers, I did something like this -

Hello everybody!

Moon Mama Counts his Starry Friends

I counted one star and kept one A triangle shaped card with number 1 written on it. card in my pocket.

A triangle shaped card with number 1 written on it. for one star. Two triangle shaped cards with number 1 written on them. for 2 stars.

Five triangle shaped cards with number 1 written on them. for how many stars? _____

When I had 10, A triangle shaped card with number 1 written on it. cards, I changed it with this card A square shaped card with number 10 written on it. .

Ten triangle shaped cards with number 1 written on them aiming to a card with Ten written on it.

But my friends kept coming. So I had to count more stars. My pockets were getting full. So when I had 10 cards like this A square shaped card with number 10 written on it. changed it with a A circular card with number 100 written on it. card.

Ten square cards with number 10 written on each aiming at a card with 100 written on it.

But I have so many, many, friends that my pockets kept getting full. Just see how many cards I had.

Chanda Mama talking to stars and saying, "All right, everybody in a line. We'll play a game." Cloud saying, "Yippee!!"

Which cards will I have in my pocket if I have counted up to...

a. 19
b. 21
c. 95
d. 201
e. 260
f. 300
g. 306
h. 344
i. 350
j. 400

When I had Two square cards with 10 written on each. cards in my pocket, I knew I had counted 20 stars. Now you tell me the number of stars counted in each case.

Write the answer in the blank space.

	=	20
	=	_____
	=	_____
	=	_____
	=	_____
	=	_____
	=	_____
	=	_____

Chanda Mama holding hands with stars in the sky and forming patterns. An owl on the cloud saying," Nice new patterns."

Guess how many starry friends I have in all... !!!

744	810	45	401	54
555	374	171	261	159
656	140	179	891	16
195	155	410	159	685
454	136	60	74	699
800	445	642	202	943

744	810	45	401	54
555	374	171	261	159
656	140	179	891	16
195	155	410	159	685
454	136	60	74	699
800	445	642	202	943

Table of Contents

2. Fun with Numbers

Dot Game

15

Dhoni's Century

Fill in the blanks:

Top Ten Scores in the Cricket World Cup

Jumping Animals

Class, Jump!

Lazy Crazy Shop

24

How Many are these?

744	810	45	401	54
555	374	171	261	159
656	140	179	891	16
195	155	410	159	685
454	136	60	74	699
800	445	642	202	943