Math 1

Approved by the Government of Nepal, Ministry of Education, Curriculum
Development Centre, Sanothimi Bhaktapur as an Additional Material

Author
Shyam Datta Adhikari

M.Sc. (Maths), TU

Tel: +977-1-4313205

Oasis School Mathematics Book-1 1

Name : ...............................................................

Class : .......................... Roll No. : ..............

Section : ..............................................................

School : ................................................................

Publisher
Oasis Publication Pvt. Ltd.
Copyright
The Publisher
Edition
First Edition : 2077
Second Edition : 2078

Language Editor
Sedunath Dhakal
Layout
Oasis Desktop
Printed in Nepal

2 Oasis School Mathematics Book-1

Oasis School Mathematics is an activity -oriented and interactive book intended for
the students of Basic level. It has been designed in compliance with the Integrated
Curriculum (2075 B.S.) of the Curriculum Development Center (CDC), the Government
of Nepal, with the focus on child psychology of requiring mathematical knowledge
and skills.

An integrated curriculum is described as one that connects different areas of study by
cutting across the subject matter lines and emphasizing unifying concept. It focuses
on making connections for students, allowing them to engage in relevant, meaningful
activities that can be connected to the real life. Mathematical knowledge and skills are
directly connected with our real life activities.

The major thrust is on creating an enjoyable experience in learning Mathematics
through the inclusion of variety of problems which are closely related to our practical
life. This book is expected to foster the positive attitude among children and encourages
them to enjoy mathematics. A genuine attempt has been made to present mathematical
concepts with ample illustrations, assignments, activities, exercises and project works
to students so as to encourage them to participate actively in the learning process.

I have tried to connect the subject matter with different themes by means of different
mathematical activities, project works, and worksheets. I make sure that this book
makes learning meaningful by allowing students to engage in meaningful and relevant
activities that can be connected to the real life.

This book has been prepared incorporating the subject matter with different themes
prescribed by the Integrated Curriculum of CDC 2075. So, I strongly believe that this
book is really helpful to implement this Integrated Curriculum.

I am highly grateful to principals, administrators, experts and mathematics teachers
who have provided me with opportunities to anticipate in workshops, teachers training
programmes and interaction programmes as a resource person. Their invaluable
feedback has helped me revise and update this series. I am very much proud of my
students who are-the source of encouragement for me to go ahead with this project. I
am also highly grateful to Mr. Sedunath Dhakal for editing the language of the series.

My grateful thanks go to Managing Director for his invaluable support and cooperation
in getting this series published in this shape.

At the end, constructive and practical suggestions of all kinds for further improvement
of the book will be appreciated and incorporated in course of revision.

Author March 2021

Oasis School Mathematics Book-1 3

Contents 5
6
1. Theme : Me and My Family 35
Hindu Arabic Numbers and Devanagari Numbers upto 10 49
Numbers from 11 to 20 58
Comparison of Size, Length and Weight 59
81
2. Theme : Our Community 84
Addition and Subtraction of Numbers upto 10 90
Addition upto Number 20 118
Odd and Even Numbers 119
Numbers upto 100 125
131
3. Theme : Our School 142
Subtraction of Numbers upto 20 158
Ordinal Numbers 159
Addition of Two-digit Numbers 162
Subtraction of Two-digit Numbers 167
168
4. Theme : Communication, Technology and Market 180
Pictograph 190
Money 199
200
5. Theme : My Creation 205
Position of Objects 226
Straight Line and Curved Line
Plane Figures

6. Theme : My Daily Activities
Time
Multiplication and Division
Model Test Paper

4 Oasis School Mathematics Book-1

Me and My
Family

Contents
• Hindu Arabic Numbers and Devanagari

Numbers upto 10
• Numbers from 11 to 20
• Comparison of Size, Length and Weight

Oasis School Mathematics Book-1 5

Hindu Arabic Numbers and
Devanagari Numbers up to 10

One
11 1 1 1 1

One One One One One One

Two
222222

Two Two Two Two Two Two

6 Oasis School Mathematics Book-1

Three

333333

Three Three Three Three Three Three

Four

444444

Four Four Four Four Four Four

Oasis School Mathematics Book-1 7

Five

555555

Five Five Five Five Five Five

Write the numbers 1 to 5.

1

One

Count and write the number of objects in the given group.

Four

4

8 Oasis School Mathematics Book-1

Six

666666

Six Six Six Six Six Six

Seven

7 77777

Seven Seven Seven Seven Seven Seven

Oasis School Mathematics Book-1 9

Eight

888888

Eight Eight Eight Eight Eight Eight

Nine

99 9 9 9 9

Nine Nine Nine Nine Nine Nine

10 Oasis School Mathematics Book-1

Count and write the number of objects in the given group.

Write the numbers from 1 to 9.
Match the following.

1
2
4
5
7
3

Oasis School Mathematics Book-1 11

More and Less

Tick () the group having more objects and cross (×) the group
having less objects.

12 Oasis School Mathematics Book-1

Count the objects and match the group having equal objects.

Oasis School Mathematics Book-1 13

Devanagari Numbers from 1 to 9

!
Ps

!! ! ! ! !

Ps Ps Ps Ps Ps Ps

b'O{

@@@@@@

b'O{ b'O{ bO' { bO' { b'O{ b'O{

14 Oasis School Mathematics Book-1

#
tLg

## # # # #

tLg tLg tLg tLg tLg tLg

$
rf/

$$$$$$

rf/ rf/ rf/ rf/ rf/ rf/

Oasis School Mathematics Book-1 15

%
kfrF

%% % % % %

kfrF kfrF kfrF kfFr kfrF kfFr

5

^^ ^ ^ ^ ^

555555

16 Oasis School Mathematics Book-1

;ft

&&&&&&

;ft ;ft ;ft ;ft ;ft ;ft

cf7

******

cf7 cf7 cf7 cf7 cf7 cf7

Oasis School Mathematics Book-1 17

gf}

((((((

gf} gf} gf} gf} gf} gf}

! b]lv ( ;Ddsf b]jgfu/L ;V+ of n]Vg'xf];\ .

ug/] bj] gfu/Ldf nV] gx' f;] \ .
%

kfFr

18 Oasis School Mathematics Book-1

Write the following Hindu-Arabic numbers into Devanagari
numbers.

12 3

45 6

78 9

tn lbOPsf bj] gfu/L ;V+ ofnfO{ lxGb' c/]ljs ;V+ ofdf n]Vgx' f;] \ .

!@ #

$% ^

&* (

hf8] f ldnfpgx' f];\ . ))) tLg
! )))) kfFr
@ rf/
# ) 5
$ )) Ps
% )))))) b'O{
^ )))))

Oasis School Mathematics Book-1 19

Zero

There are 3 balls in a basket.
One ball is taken out.
How many balls left on the basket?

There are two balls on the basket.
Again, one ball is taken out.
How many balls left on the basket.
There is one ball on the basket.

Again,
One ball is taken out.
There is no ball on the basket.
There is zero ball on the basket

000 0 0 0

Zero Zero Zero Zero Zero Zero

Write the number of:

Balls Pencils

Flowers Copy

Apples Cap

20 Oasis School Mathematics Book-1

Ten

10 1 0 1 0 1 0 1 0 1 0
Ten Ten Ten Ten Ten Ten

Make the group of 10 as shown in the figure.

Oasis School Mathematics Book-1 21

!) bz

!) !) !) !) !) !)

bz bz bz bz bz bz

tn lbOPsf ;ª\Vofx?sf] gfd nV] g'xf];\ .

!#

@$

^*

&%

( !) cf7

tn lbOPsf ;ª\Vof gfdsf ;V+ of n]Vg'xf];\ .

tLg rf/

gf} ;ft kf“r

5 b'O{ bz

22 Oasis School Mathematics Book-1

Count the following.

Your family members
Your brothers
Your sisters
Fingers in your hand
Total fingers in your two hands
Copies in your bag
Books in your bag
Doors in your house
Windows in your house
Your legs
Your hands
Your eyes
Your nose
Your ears
Your dolls
Furnitures in your house

Oasis School Mathematics Book-1 23

Numbers from 1 to 10 Objects
Objects
Hindu-Arabic numbers Number names
1 One
2 Two
3 Three
4 Four
5 Five
6 Six
7 Seven
8 Eight
9 Nine
10 Ten

Devanagari Numbers Number names

! Ps
@ bO' {
# tLg
$ rf/
% kfFr
^ 5
& ;ft
* cf7
( gf}+
!) bz

24 Oasis School Mathematics Book-1

Fill in the numbers on the rocket from bottom to top:

I can write the

10 numbers and the Ten

number names.

1 One

Count the objects and write the numerals and the number name:
1 One

Oasis School Mathematics Book-1 25

Match the following: Five
Three
3 One
1 Six
5 Two
6 Four
7 Seven
4 Eight
8 Nine
9
2

Count and write the number of things given below:

Birds Flowers Bus
House
Trees Ducks

Write the missing numbers. 7

14

26 Oasis School Mathematics Book-1

Find the hidden number names going across

Worksheet or down the puzzle and colour them using

your favourite colour.

p q mo n e s t r x y n
t s p r n i n s p t wo
h f o u r wd i x t e n
r l d mj f k x r t v u
e gof c i pe i ght
e n s e e v n a t mg h
ni ne e e bs ol s r
pi s j kui z noe e
u t v ws mg j e k v e
t e ns i l hni ne i
u y v x x z t wj h n j

Oasis School Mathematics Book-1 27

Before - After - Between

Look and learn.

12 3 4 56 7 8 9

6 comes just after 5. 6
6 comes just before 7. 9
6 comes between 5 and 7.
Write the number which comes just before. 6
7
23 4 2

75 8

Write the number which comes just after.

12 2 5 6
2
7 84
3
Write the number which comes in between. 7
9
2 34 7 9 4

6 83 5 5
Write the numbers that come just before and after.

65
28

4

28 Oasis School Mathematics Book-1

One more than and one less than the given numbers.

Look and learn.

123 4 5 67 8 9 10

Let's observe this number line.

5 comes just after 4.

5 is 1 more than 4.

5 comes just before 6.

5 is 1 less than 6.

3 comes just before 4. 9 comes just after 8.
3 is 1 less than 4. 9 is 1 more than 8.

Write the number which is Write the number which is
1 less than 4 = 1 more than 3 =
1 less than 6 = 1 more than 8 =
1 less than 9 = 1 more than 6 =
1 less than 5 = 1 more than 3 =
1 less than 7 = 1 more than 5 =

Oasis School Mathematics Book-1 29

Comparison of numbers

Look and learn.

Let's compare 6 and 4.
Match the balls of the first group with the balls of the second group.

6=
4=

The first group has 2 more balls.
So, 6 is greater than 4.
Match the balls of two groups and circle the bigger number.

5=

7=

6=

3=

5=
4=

7=
9=

2=
4=

30 Oasis School Mathematics Book-1

Comparison of numbers with the help of number lines

Look and learn.

12 3 4 5 6 7 8 9 10

Here, 2 is bigger than 1 My idea! The number on
But, 2 is smaller than 4. the right is bigger than the
The number which comes before
is the smaller number and the number on the left.
number which comes after is the
bigger one.

Use the given number lines to compare the numbers. Circle the
bigger number.

1 2 3 4 5 6 7 8 9 10

46 83

75 63

28 93

Use the given number lines to compare the numbers. Circle the
smaller number.

49 52

24 83

92 56

Oasis School Mathematics Book-1 31

Circle all the numbers bigger Circle all the numbers smaller
than 3. than 7.

41 2 9 8
6 7 7
64
10

Circle all the numbers Circle all the numbers
between 2 and 7. between 5 and 9.

13 5 34 6
8 10 6 87 10

Circle all the numbers greater Circle all the numbers smaller
than 6. than 8.

45 7 53 10
89 10 42 9

Circle all the numbers between Circle all the numbers between
2 and 8. 1 and 5.

19 10 32 4
45 6 67 8

32 Oasis School Mathematics Book-1

Ascending and Descending order of Numbers

Look and learn.

Ascending means starting from the smallest and going up to the
largest one.
Descending means starting from the largest and going down to the
smallest one.
2, 5, 7, 9 ascending order 10, 8, 6, 4 descending order
Arrange the given numbers in ascending order.

Arrange the given numbers in descending order.

Oasis School Mathematics Book-1 33

Unit Evaluation Full Marks : 30

1. Write the numbers from 1 to 10. 5

2. bj] gfu/Ldf ! b]lv !) ;Ddsf ;ª\Vof nV] g'xf];\ . 5

3. Write the number names of : 4
4
56

74
4. tn lbOPsf b]jgfu/L ;+ª\Vofsf] gfd nV] gx' f;] \ .

$*

!) # 4

5. Match the following. 4
4
7$
3%
4&
5#

6. Circle the bigger number.

4 89 6

5 79 8

7. Circle the smaller number.

1 35 4

7 92 6

34 Oasis School Mathematics Book-1

Numbers from 11 to 20

Look and learn.

10 + 1 = 11 Eleven

10 + 2 = 12 Twelve

10 + 3 = 13 Thirteen

10 + 4 = 14 Fourteen

10 + 5 = 15 Fifteen

Oasis School Mathematics Book-1 35

10 + 6 = 16 Sixteen

10 + 7 = 17 Seventeen

10 + 8 = 18 Eighteen

10 + 9 = 19 Nineteen

10 + 10 = 20 Twenty

36 Oasis School Mathematics Book-1

Complete as shown above: =

+

+=

+=

+ =

Addition of 10 to a number

Let's add 10 to 3 I got the idea!
It means 1 Ten + 3 Ones = 13 4 + 10 = 14,
i.e. 3 + 10 = 13 5 + 10 = 15

Add: 8 + 10 = Oasis School Mathematics Book-1 37
1 + 10 = 9 + 10 =
2 + 10 = 5 + 10 =
3 + 10 = 6 + 10 =
4 + 10 =

Tens and Ones

This is One.
These are 2 Ones.
These are 4 Ones.
These are 10 Ones
This is 1 Ten.
These are two groups of Tens.
These are 2 Tens.

This is One Tens and 2 Ones.

Count the number of Tens and Ones.

Tens Ones
1

Tens Ones

Tens Ones

Tens Ones

38 Oasis School Mathematics Book-1

Numbers 11 to 20 in terms of Tens and Ones

Number Objects
11
Tens Ones Eleven
11

12 Tens Ones Twelve

13 Tens Ones Thirteen

14 Tens Ones Fourteen

15 Tens Ones Fifteen

16 Tens Ones Sixteen

17 Tens Ones Seventeen
Tens Ones Eighteen
18 Tens Ones Nineteen
Tens Ones Twenty
19
1 Tens + 4 Ones =
20 1 Tens + 6 Ones =
Complete as shown: 1 Tens + 1 Ones =
1 Tens + 2 Ones = 12
1 Tens + 5 Ones = Oasis School Mathematics Book-1 39
1 Tens + 8 Ones =

Numbers from 11 to 20 20
Numbers Number Names 1
11 Eleven
12 Twelve
13 Thirteen
14 Fourteen
15 Fifteen
16 Sixteen
17 Seventeen
18 Eighteen
19 Nineteen
20 Twenty

Write the missing number:
15

12

Write the missing number:
20 16

9

40 Oasis School Mathematics Book-1

Write the number and the number name as shown.

10 Ten 12

13 18

19 17 8 20
17
Fill in the numbers from 1 to 20. 3 11
1
15 12
12

Fill in the numbers from 20 to 1.
20 16

Write the number that comes just after.

13 10 15

17 11 19 14
14
Write the number that comes just before.

17 9 11

18 10 19 1157
10 12
Write the number that comes in between.

15 17 12 14

13 15 9 11 17 19

Write the numbers which come before and after the given numbers.

15 18 16

12 17 19

Oasis School Mathematics Book-1 41

Comparison of numbers Circle the smaller number.
10 12
Circle the bigger number.
11 13

12 10 13 14

14 13 12 10

19 18 15 13

16 14 17 18
Circle the biggest number. Circle the smallest number.

5 79 12 15 18

12 15 11 11 9 8

17 12 16 5 15 2

18 17 8 15 16 13

Arrange the numbers from the smallest to the biggest.

13 7 9 7 9 13

12 15 11
5 79

12 15 11
Arrange the numbers from the biggest to the smallest.

15 18 17 18 17 15

7 94

12 10 11

14 13 16

42 Oasis School Mathematics Book-1

Circle all the numbers greater than 12. 19
9 11 17
20 16 10

Circle all the numbers between 10 and 20
16 18 6 9
7 15 18

Circle all the numbers less than 16. 18
7 12 19
15 20 10

Circle all the numbers greater than 12 and less than 18.
10 11 14 16
15 20 10

Circle all the numbers less than 15.

14 12 11 9 18

16 17 19

Circle all the numbers less than 18 and greater than 13.

11 12 15 16

17 19 20 18

Oasis School Mathematics Book-1 43

Place Value on the Abacus

Look and learn.

The abacus is made up of a set of rods. Each rod stands for place value.
The rod on the right represents place value 'Ones'.
The rods on the left represents place value 'Tens'.

Let's count the beads. Tens Ones
1 Tens and 3 Ones
∴ The number is 13

Number 11 to 20 on Abacus:

11 = 1 Tens and 1 Ones Tens Ones

Tens Ones 12 = 1 Tens and 2 Ones

Complete as above:

13 = Tens and Ones Tens Ones

Tens Ones 14 = Tens and Ones

44 Oasis School Mathematics Book-1

15 = Tens and Ones Tens Ones

Tens Ones 16 = Tens and Ones

17 = Tens and Ones Tens Ones

Tens Ones 18 = Tens and Ones

19 = Tens and Ones Tens Ones

Tens Ones 20 = Tens and Ones

Oasis School Mathematics Book-1 45

Devanagari Numbers from 11 to 20

Hindu-Arabic Devanagari Number Names
Numbers Numbers
P3f/
11 !!

12 !@ afx|

13 !# tx] |

14 !$ rfw}

15 !% kGw|

16 !^ ;f]x|

17 !& ;q

18 !* c7f/

19 !( pGgfO;

20 @) aL;

!! bl] v @) ;Ddsf b]jgfu/L ;V+ ofx? nV] g'xf;] \ .

lbOPsf ;V+ ofsf] gfdaf6 bj] gfu/L ;+Vof nV] g'xf;] \ . aL;
;q c7f/ rf}w
P3f/ kGw|

46 Oasis School Mathematics Book-1

Write the following numbers in Devanagari.
11 12 14

18 19 20

10 13 15

16 17

tn lbOPsf b]jgfu/L ;ª\VofnfO{ lxGb' c/]las ;ª\Vofdf nV] g'xf;] \ .

!) !# !%

!^ !* @)

!$ !! !@

!& !(

lbOPsf bj] gfu/L ;ª\Vofsf] gfd nV] g'xf];\ .

!! !)

!# !%

!@ !$

!@ !^

!( !*

Oasis School Mathematics Book-1 47

Unit Evaluation Full Marks : 20

1. Write the missing numbers. 2

12 15 18

2. Match the following. 4
6
14 • • Nineteen

16 • • Fourteen

19 • • Sixteen

20 • • Fifteen

15 • • Twenty

3. Write the correct number in the box.

Tens Ones =

Tens Ones =

Tens Ones =

4. Add: 4
4
10 + 2 = 10 + 5 =

10 + 7 = 10 + 9 =

5. Write the number name of:

11 15

18 17

48 Oasis School Mathematics Book-1

Comparison of Size, Length and Weight

Big and Small

Big elephant Small elephant

Big house Small house

Tick () the bigger object and cross (×) the small one.

Oasis School Mathematics Book-1 49

Tall and Short

Tall tree Short tree

Tall man Short man

Tick () the taller object and cross (×) the shorter one.

50 Oasis School Mathematics Book-1