2 fun with numbers - prashanth...
TRANSCRIPT
13
Fun with Numbers
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 morethan 40.
13
2
14
Can you guessthe number ofdots on me ?
And on me?
Dot GameDot GameDot GameDot GameDot Game
Guess the number of dots in the circle. Now count and checkyour guess. Play this game with your friends by making circles.See who can guess best.
Children need interesting exercises to help them with visual estimation of numbers – of thingsarranged randomly and in symmetrical groups. Teachers could use other instances, such asbundles of leaves sold in the market, the school assembly, designs on mats, etc. to make themguess and estimate different numbers. In this book an ant has been used to show the childthat a guess or estimate has to be made.
15
Has he completedhis century?
Dhon
i on 96
..... O
nly one
ball lef
t.....w
ill he co
mplete
his
century?
........
And look
at this
!
What a m
arvello
us six !
Dhoni's CenturyDhoni's CenturyDhoni's CenturyDhoni's CenturyDhoni's Century
One-day match between India and South Africa inGuwahati......., India batting first......
Fill in the blanks:Fill in the blanks:Fill in the blanks:Fill in the blanks:Fill in the blanks:
Dhoni scored 96 + = runs.
How many runs do these players need to complete a century?
Numbers are understood not by reciting them in order but by making associations in familiarcontexts. Here the idea of a "century" of runs is used. Teachers could add other examples fromchildren's lives to think about 3-digit numbers. Encourage them to speak about large numberseven if they cannot read or write them.
Runs needed to
complete a century
Player 1 93
Player 2 97
Player 3 89
Player 4 99
Runs scored
16
99-112 195-206
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
Number
(in words)
Number
(in figures)
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
Fill in the Blanks:Fill in the Blanks:Fill in the Blanks:Fill in the Blanks:Fill in the Blanks:
After
99 we
go
on like
this See
you
tomorro
w
9999999999 100100100100100 101101101101101 102102102102102
Oh! 206! Guess how many moreto make a triple century?
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Top Ten Scores in the Cricket World CupTop Ten Scores in the Cricket World CupTop Ten Scores in the Cricket World CupTop Ten Scores in the Cricket World CupTop Ten Scores in the Cricket World Cup
✸ C.K. just missed his century. How many runs did he need tomake 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 betweenthem.
✸ scored 2 more than one and a half century.
A.P.J. 128
A.S. 100
C.K. 99
D.M. 162
K.S.P. 152
Player Score
M.D. 178
P.K. 105
S.T. 141
T.P.K. 112
V.V.S. 127
Player Score
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Easy ! J
ust
skip in tens.
Counting in 50'sCounting in 50'sCounting in 50'sCounting in 50'sCounting in 50's
Wow
! How
did
you do
tha
t ?
Counting in 10'sCounting in 10'sCounting in 10'sCounting in 10'sCounting in 10's
Finish
1010101010
2020202020 3030303030 4040404040 5050505050 60606060607070707070
8080808080
9090909090
100100100100100
110
190
200
10
20
30
100
310
400
720
780
Count in
fifty
up in a ji
ffy
5050505050
5050505050
5050505050
5050505050
550
650
750
850
200
250
350
500
How far can you go like this?
What is the biggest number you can call out?
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Colour the NumbersColour the NumbersColour the NumbersColour the NumbersColour 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
One hundred forty
Two hundred two
Two hundred sixty-one
Eight hundred
300 + 70 + 4
600 + 50 + 6
5 + 50 + 100
Red
Fifty-four
Sixty
One hundred ninety-five
Five hundred fifty-five
600 + 40 + 2
100 + 70 + 9
800 + 10
Yellow
Four hundred forty-five
Sixteen
One hundred fifty-nine
Six hundred eighty-five
600 + 90 + 9
70 + 4
1 + 90 + 80
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90909090909999999999
106106106106106
8989898989 9191919191
9292929292
9393939393
9494949494 9595959595
9696969696
9797979797
9898989898
100100100100100
101101101101101
102102102102102
103103103103103
104104104104104105105105105105
107107107107107
108108108108108 109109109109109 110110110110110
Gabru Bunny
Tarru
Jumping AnimalsJumping AnimalsJumping AnimalsJumping AnimalsJumping Animals
Gabru, Bunny andTarru are jumping allthe way. Gabru jumps on every 7th square, Bunny on every5th square, Tarru on every 4th square.
Gabru starts jumping from square number 90.
Bunny starts jumping from square number 99.
Tarru starts jumping from square number 106.
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Bunny's tenth jump is on square number .
Tarru's tenth jump is on square number .
Gabru's tenth jump will be on square number .
Gabru and Bunny both jump on squares 104 and .
Find out:
❖ Tarru and Bunny jump on squares , , and .
❖ Is there any square where all three of them jump?
❖ Guess who will finish in the least jumps? In howmany jumps?
175175175175175 174174174174174
Hee! He
e!
All this
jumping
is
tickling
me.
111111111111111
112112112112112
113113113113113
114114114114114115115115115115
116116116116116
117117117117117
118118118118118
119119119119119
120120120120120
121121121121121122122122122122
123123123123123
124124124124124
125125125125125 126126126126126 127127127127127
128128128128128
129129129129129
130130130130130
131131131131131 132132132132132133133133133133
134134134134134
135135135135135
136136136136136
137137137137137
138138138138138
139139139139139
140140140140140
141141141141141
142142142142142 143143143143143144144144144144
145145145145145
146146146146146
147147147147147 148148148148148 149149149149149
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Class, Jump!Class, Jump!Class, Jump!Class, Jump!Class, Jump!
Jump 2 steps forward:
104, 106, 108, , , , .
Jump 2 steps backward:
262, 260, 258, , , , .
Jump 10 steps forward:
110, 120, 130, , , , .
Jump 10 steps backward:
200, 190, 180, , , , .
Continue the pattern:
550, 560, 570, , , , .
910, 920, 930, 940, , , , .
209, 207, 205, , , , .
401, 402, 403, , , , .
Long way to
go!
Join in!
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Lazy Crazy ShopLazy Crazy ShopLazy Crazy ShopLazy Crazy ShopLazy Crazy Shop
This is the jungle shop. Lazy Crazy gives things only in packetsof tens, hundreds and loose items.
Find out how many packets of tens, hundreds and loose itemseach animal will take. Fill in the blanks.
Loose
items
Packets
of 10
Packets
of 100
143
210
242
552
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Lazy Crazy also has a crazy way of taking money. He takes only
in notes, notes and 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.Who am I? Match with the number.Who am I? Match with the number.Who am I? Match with the number.Who am I? Match with the number.
a) I come between 40 and 50 andthere 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 decimalnumber 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 whileworking in tribal communities.
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How Many are these?How Many are these?How Many are these?How Many are these?How Many are these?
rupees
sticks
blocks
beads
rupees
10010
100
Who am I?Who am I?Who am I?Who am I?Who am I?
There is no biggest number
The biggest you cannot find
Add me to get the next one
To count, keep me in mind.
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I am Chanda Mama. I have so many friends which twinkle in thesky. Yes, you are right! My friends are stars. One day all ofthem came to my home. I started counting to see how manyfriends had come. But my friends were too many. So toremember their numbers, I did something like this —
Helloeverybody!
I counted one star and kept one card in my pocket.
for one star. for 2 stars.
for how many stars?
When I had 10 cards, I changed it with this card .
But my friends kept coming. So I had to count more stars. Mypockets were getting full. So when I had 10 cards like this Ichanged it with a card.
Moon Mama Counts his Starry FriendsMoon Mama Counts his Starry FriendsMoon Mama Counts his Starry FriendsMoon Mama Counts his Starry FriendsMoon Mama Counts his Starry Friends
But I have so many, many, friends that my pockets kept getting full.Just see how many cards I had.
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All right,everybody in a
line. We'll play a game.
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