Math 1

Add. Tens Ones Add Ones:
8 + 7 = 15 → 1 Tens + 5 Ones
carry 1 8 carry over 1 Tens
over 3 7 Add Tens:
+4 5 3 + 4 + 1 = 8 Tens
8

Tens Ones Tens Ones Tens Ones

1 83 7 5 6
+2 7 +2 4 +2 5

Tens Ones Tens Ones Tens Ones

2 8 3 7 4 4
+3 7 +2 5 +1 6

Add. carry over 5 + 6 = 11

1 write 1 at the bottom, carry over 1
1 Tens + 1 Ones
25 2 + 2 + 1 = 5 Tens

+ 2 6
51

37 68 59 19 17 82
+ 4 3 + 2 4 + 2 3 + 8 + 4 7 + 8

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Add: 6 7 3 8 3 7
+ 2 6 + 6 4 + 5 8
4 3
+ 2 8

2 9 5 7 8 9 5 4
+ 6 8 + 3 5 + 1 5 + 4 8

6 7 2 3 4 5 6 7
+ 2 6 + 6 9 + 3 5 + 2 7

3 8 2 4 3 6 5 7
+ 4 3 + 6 8 + 2 7 + 2 3

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Subtraction with borrowing

Look and learn.

Tens Ones 7 cannot be subtracted from 2.
Borrow 1 Ten from 4 Tens, leaving 3 Tens.
3 12
In Ones
4 2 2 Ones + 10 Ones = 12 Ones
12 Ones - 7 Ones = 5 Ones
-2 7 In Tens
5 3 Tens - 2 Tens = 1 Tens
1

Subtract as above. Tens Ones Tens Ones

Tens Ones

63 52 56

–3 7 –3 7 –2 9

Tens Ones Tens Ones Tens Ones
5 4 9 2 7 3

–3 5 –7 6 –5 6

Tens Ones Tens Ones Tens Ones
6 4 3 2 6 2

–2 9 –2 8 –3 5

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Subtraction with borrowing

Look and learn.

3 12 3 cannot be subtracted from 2. Borrow 1 Ten from
42 4 Tens, leaving 3 Tens.

–2 3 Subtract Ones: 12 Ones - 3 Ones = 9 Ones
Subtract Tens: 3 Tens - 2 Tens = 1 Tens
19
Subtract: 7 2 5 3 Subtract quickly:
- 5 8 - 2 8
6 3 13 - 5 =
- 4 7 14 - 6 =
12 - 4 =

7 2 6 2 5 1 18 - 9 =
- 3 6 - 2 8 - 2 9 17 - 8 =
14 - 8 =
8 4 8 2 8 4 11 - 7 =
- 3 7 - 3 6 - 5 7 15 - 9 =
14 - 9 =

5 6 6 2 9 2 13 - 6 =
- 4 7 - 3 8 - 7 8 12 - 9 =
11 - 8 =

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Solve the given problems and colour the

Worksheet picture with the help of the given colour

code.

Below 30 30 to 50 50 to 80 Above 80

18 73 + 12
+ 10 84 – 52

68 + 21

56 + 32 47 + 22
68 - 24
15 + 12 13 + 10 10 + 6 3 + 5
22 + 23 28 + 10

12 + 21 60 - 20 52 - 31
50 - 10

To the teacher

Ask the students to solve the problem in their copy and shade the
pictures according to the colour code.

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Unit Evaluation Full Marks : 30

1. Use number line to add. 2

20 21 22 23 24 25 26 27 28 29 30
22 25

+5 +3

2. Use number line to subtract. 2

30 31 32 33 34 35 36 37 38 39 40
38 35
–6 –4

3. Add using place value chart. 4
Ones
Tens Ones Tens Ones Tens Ones Tens
5
53 65 47 3 4
+1 2 +3 4 +5 1 +3

4. Subtract using place value chart. 4
Ones
Tens Ones Tens Ones Tens Ones Tens
5
68 64 77 4 2
–4 2 –4 3 –5 2 –2

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5. Add or subtract: 4

23 6 3 82 37

+5 4 – 4 2 +7 1 +3 2

6. Solve the following verbal problems: 4

a. Ansu had 18 story books. Her
mother bought 41 more books
for her. How many books

does Ansu have now?

Ansu has books.

b. Yashmi had 48 apples. She 6
gave 15 apples to her friends.
How many apples are left?

apples are left.

7. Add:

47 38 28

+2 4 +5 6 +3 9

8. Subtract: 4

42 53

–2 6 –2 7

Oasis School Mathematics Book-1 157

Communication,
Technology and

Market

Contents
• Pictograph
• Money

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Pictograph

Zenith arranged his study materials in the pictograph.

6

5

4

3

2

1

Pencil Copy Eraser Sharpeners Scale

Study the above pictograph and answer the following:

How many pencils has he got? I know how to study
How many copies has he got? pictograph.

How many erasers has he got?

How many scales has he got?

How less is the number of sharpeners than the erasers?
Is the number of copies more than the scales?
How many more pencils are there than the scales?

Oasis School Mathematics Book-1 159

Study the given pictograph and answer the given questions.
The given pictograph shows the favourite fruits of students of
class I.

8

7

6

5

4

3

2

1 Banana Mango Orange Cherry
Apple

How many students like mango?

How many students like cherry?

How many students like apple?

Which is the most favourite fruit?

How many students are there altogether?

Which is the least favourite fruit?

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Drawing a pictograph

Look at the given objects. Divide them into different groups
according to their shapes and draw the pictograph.

Circle Numbers Triangle Numbers Square Numbers
6

8 Triangle Square
7
6
5
4
3
2
1 Circle

To the teacher

Give similar type of questions for practice in students' copy.

Oasis School Mathematics Book-1 161

Money

Our Coins

Look and learn.

10 paisa 25 paisa 50 paisa Rs.1

Rs. 2 Rs. 5 Rs. 10

Our Nepali notes

Re. 1 Rs. 2 Rs. 5

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Rs. 10 Rs. 20 Rs. 50

Rs. 100
Identify the following Nepali notes:

Rs. 50

Oasis School Mathematics Book-1 163

Math the following. Rs. 5
Math the following. Rs. 10
Rs. 1
164 Oasis School Mathematics Book-1 Rs. 2

Rs. 10
Rs. 20
Rs. 5
Rs. 100
Rs. 50

Unit Evaluation Full Marks : 13

1. Given pictograph shows the number of different flowers in the
garden. 5

5

4

3

2

1

Rose Marigold Lotus Hibiscus Lily

a. How many roses are there in the
garden?
b. How many Marigolds are there in the garden?
c. Which flower is least in number?
d. What is the total number of flowers in
garden?

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2. Identify the following paper notes. 4

3. Identify the following coins. 4

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My Creation

Contents
• Position of Objects
• Straight Line and Curved Line
• Plane Figures

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Position of Objects

Right and Left

This is my right hand.
This is my left hand.
Tick () the object on the right and cross (×) the object on the left.

Activity • Name the friend who is on the right to you

• Name the fried who is on the left to you

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Inside and Outside

The man is outside the car. The man is inside the car.

Tick () the object which is inside and cross (×) the object which
is outside.

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In front of, Between and Behind

Cow is in front of the cat.
Cat is behind the cow.
Dog is in front of the cow.
Cow is behind the dog.

Hen is in front of goat.
Goat is behind the hen.
Buffalo is in front of hen.
Hen is behind the buffalo.

Tick () the object which is in front of and cross (×) the object
which is behind. Write B on the object which is in between.

To the teacher

Keep three students in line and give the concept of in front of and
behind by activity.

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Observe the given figure and answer the questions given below.
Tick () the correct answer.

Madhav Pema Karim
► Who is in front of Pema?
Madhav Karim
Karim
► Who is behind Pema? Madhav
Pema
► Who is in between? Madhav Madhav
Karim Karim

► Who is in front of Karim? Pema
► Who is behind Madhav? Pema

Activity

Fill in the given circle with the letters.

► A is in between the house and the man.
► B is right to the Man.
► C is left to the flower.
► D is left to the dog.
► E is in between the bird and the tiger.
► F is behind to the tiger.

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Above and Below

The cat is above and the dog
is below.
Tick () the object which is above and cross (×) the object which
is below.

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Observe the given picture and explain the points that you have
seen in the picture.

Observe the given figure and tick () the correct answer.
► Cows are ............................. the home. (outside / inside)
► Boy is ................................... the man. (infront of / behind)
► Basket is .............................. the boy. (infront of / behind)
► Women are .......................... the home. (inside / outside)
► Basket is in .......................... boy and woman. (between /behind)

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On and Under

The book is on the table.
The bag is under the table.

The pot is on the table.
The cat is under the table.

Tick () the object which is on the table and cross (×) the object
which is under the table.

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Near and Far

Lets discuss, who is near the house?

Saleem Saleem is far from the house.
Nargish is near the house.

Nargish

Who is near and who is far from temple?

Ram is near the temple.
Sita is far from the temple.

Ram Sita

Circle the object which is near the house and cross (×) the object
which is far from house.

Oasis School Mathematics Book-1 175

Study the given picture and discuss about inside and outside,
right and left, in front of and behind, above and below, near
and far, etc.

Tick () the correct answer.

► Which objects are above? Birds Ducks
► Which objects are below? Birds Ducks
► Which is inside the car? Boy Ducks
► Which object is near the house? Car
► Which object is far from house? Car Bus
Bus

Write two statements using in front of:

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Above, On and Below

► How many things are on the ground?
on

► How many are above the ground?
above

► How many are below the ground?
below

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Activity

Answer orally:
• Show your right hand
• Show your left hand
• Name your friend who is left to you
• Name your friend who is right to you
• Name your friend who is in front of you
• Name your friend who is behind you
• A bus is running on the road and an aeroplane is flying on
the sky, which object is above and which one is below?
• Which place is near to your classroom: your playground
or your canteen?

Observe your classroom and mention one statements using
Left and Right
Above and Below
Inside and Outside
Infront of Between and Behind
On and Under

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Unit Evaluation Full marks: 8

1. Tick () the object which is inside and cross (×) which is
outside the bag. 2

2. Colour the object with red which is infront of the boy and
colour the object green which is behind the boy. 1

3. Ring the object which is on the table. 1
4. Colour the fruits which is left to the boy. 2

5. Observe the given picture and answer the question given
below. 2
Which is above ?
Cow Bird
Which is below ?
Cow Bird

Oasis School Mathematics Book-1 179

Straight and Curved Lines

Drawing of lines by joining the points.
This is a point.
These are points.

Join the following points and form the lines.

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Horizontal Line, Vertical Line and Slanting Line

Lets observe different types of straight lines.

Horizontal line Vertical line

Slanting line Slanting line

Join the dots and draw the lines.

Identify whether the given lines are horizontal, vertical or slanting.

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Join the dots and draw the line.

Observe the given letters and find the number of horizontal line, vertical
line and slanting line.

Number of horizontal line
Number of vertical line
Number of slanting line
Number of horizontal line
Number of vertical line
Number of slanting line

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Straight lines and curved lines

Look and learn.

Let us study the following:

A stick is straight.
A rope is curved.

This line is not bent.
It is a straight line.

This line is not bent.
It is a straight line.

This line is bent.
It is a curved line.

This line is bent.
It is a curved line.

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Join the points to make straight lines.
Join the points to make curved lines.

Identify whether the given lines are straight or curved. Write S for
straight line and C for curved line.

Join the points to make given lines.

Straight line Curved line

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Write the number of straight and curved lines in the given letters.

The number of straight lines 2

The number of curved lines 0

The number of straight lines

The number of curved lines

The number of straight lines

The number of curved lines

The number of straight lines

The number of curved lines

The number of straight lines

The number of curved lines

The number of straight lines

The number of curved lines

The number of straight lines

The number of curved lines

Oasis School Mathematics Book-1 185

Let's know about the shapes around us
Let's identify the similar shapes.

Join the similar shapes by a line.

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Colour the similar shapes on the left.

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Colour the given objects using given colour code.

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Let's compare the size of shapes.

Smaller shape Bigger shape

Colour the smallest shape by red and biggest shape by blue.

Oasis School Mathematics Book-1 189

Look and learn. Plane Figures

Circle

These objects are circular in shape.
It is a circle.
It is made up of a curved line.

Triangle These objects are
triangular in shape.

It is a triangle.

! It is made up of three

straight lines.

Rectangle and square These objects are
It is a square. rectangular in shape.

It is a rectangle.

It is made up of four straight
lines.

It is made up of four straight lines.

All straight lines are equal in length.

This object is semi circular in shape.

This is a semi circle.

It is made up of a straight
line and a curved line.

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Colour the circles red and triangles blue.
Colour the rectangles green and squares yellow.
Match the objects with the correct shapes on the right.

Write the name of given geometrical shape.

Oasis School Mathematics Book-1 191

Activity

Make the picture of imagination by pasting different shapes.

Materials required:

i) Several cut-outs of different shapes in various colour

ii) White sheets of paper Cut-outs of paper
iii) Glue

To the teacher

• Ask the students to make many cut-outs of triangles, squares, circles and rectangles
from coloured paper.

• Ask them to paste these cut-outs to make different shapes like birds, house, etc.

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Using objects draw the following shapes in your copy.

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Without using object, draw the following shapes.

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Objects around us.

Match the similar objects by drawing a line.

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Unit Evaluation Full marks: 33

1. Join the given three points. 1

•

••

2. Join the given points. 2

3. Tick(√) the objects similar to the object on the left. 3

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4. Observe the given picture and count horizontal line, vertical
line, and slanting line. 4

Horizontal lines 3
Vertical lines
Slanting lines
5. Tick(√) the figure similar to the left.

6. Join the following dots to make. 5

left slanting line right slanting line horizontal line

vertical line curved line

7. How many of each do you see in the given figure. 4

Horizontal lines Slanting lines
Vertical lines

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8. Colour the triangle. 1

9. How many of each do you see in the figure 2

Straight lines

Curved lines

10. Match the shapes of the given objects with the shapes on the
right. 4

11. Draw the figure of : 4

Triangle Rectangle

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My Daily
Activities

Contents
• Time

Oasis School Mathematics Book-1 199

Time Morning • Day • Night

Tick () the activity that is done in the Morning.

Tick () the activities that are done in the Day.

Tick () the activity that is done at Night.

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