Math 1

Write (M) for the activity done in the morning (D) for the activity
done in day and (N) for the activity done at night.

Oasis School Mathematics Book-1 201

AAccttiivviittyy Draw a picture showing an activity that
you generally do in that part of the day
and colour.

Morning

Day

Night

202 Oasis School Mathematics Book-1

Days of the week

There are 7 days in a week.

Sunday Monday Tuesday Wednesday Thursday Friday Saturday

cfOtaf/ ;fd] af/ du+ naf/ aw' af/ ljlxaf/ z'qmaf/ zlgaf/

The first day The second The third The fourth The fifth The sixth The seventh
day day day day day day

Fill in the blanks.

There are days in a week. Sunday
Monday
The first day of the week is Tuesday
Wednesday
The third day of the week is Thursday
Friday
The seventh day of the week is Saturday

Thursday comes after

comes after Tuesday.

Friday comes after

Sunday is the day of the week.

Tuesday is the day of the week.

Match the following: Comes after Sunday Oral Test

Sunday The first day of the week What day is today?
Monday The seventh day of the week
Wednesday The fourth day of the week What day will it be
Friday Comes before Saturday tomorrow?
Saturday
What day was
yesterday?

What day is the
holiday?

Oasis School Mathematics Book-1 203

Write the order of the days which comes first to last.

1

Answer the following questions.
How many days are there in a week?
Which is the first day of the week?
Which day comes after Sunday?
Which is the last day of the week?
Which day comes before Friday?
Which day is today?
Which is the second day of the week?

Yesterday Today Tomorrow
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday

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Multiplication and Division

Multiplication as the repeated addition

Look and learn. These are 2 sets of 2 beads
2+2=4
This is a set of 2 beads.

2=2

These are 3 sets of 2 beads.

2+2+2 =6

In the above case, the same number is added over and over.

This is repeated addition.

Hence, multiplication is the repeated addition. I understand!
If the same number is added
The symbol of multiplication is 'X'.

Let's see an example, over and over, that is repeated
addition.
2+2+2+2

2 is added 4 times.

∴2 + 2 + 2 + 2 = 4 twos = 4 × 2

Colour the repeated addition:

2 + 2 2 + 3+4 2+5+6 2 + 2 + 2 + 2 + 2 +2 +2

2 + 3+4 2+2+2 2+2+2+2+2

Change into multiplication: Count how many
2 + 2 + 2 = 3 × 2 2's are there?

2 + 2 + 2 + 2 + 2 =

2 + 2 + 2 + 2 =

2 + 2 + 2 + 2 + 2 + 2 =

2 + 2 + 2 + 2 + 2 + 2 +2 +2 =

Oasis School Mathematics Book-1 205

Multiplying by 2 This is a set of 2 flowers.
Look and learn.
1×2 =2
2 = 2 flowers
1 twos is 2.

These are two sets of 2 flowers.

2×2 =4

2 + 2 = 4 flowers 2 twos are 4.

These are three sets of 2 flowers.

3×2 =6
2 + 2 + 2 = 6 flowe rs 3 twos are 6.

These are four sets of 2 flowers.

4×2 =8

2 + 2 + 2 + 2 = 8 flow ers 4 twos are 8.

Complete as above.

2 + 2+ 2+ 2+ 2 =
sets of flowers
5×2 =
5 twos are

2 + 2+ 2+ 2+ 2 + 2 = 6×2 =
sets of flowers 6 twos are

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2 +2+2+2+2 + 2 + 2 =

sets of flowers 7×2 =
7 twos are

2 + 2+ 2+ 2+ 2+ 2 + 2+ 2 =

sets of flowers 8×2 =
8 twos are

2 + 2+ 2+ 2+ 2+ 2+ 2+ 2+ 2

sets of flowers =

9×2 =
9 twos are

2 + 2+ 2+ 2+ 2+ 2+ 2+ 2+ 2+ 2

sets of flowers =

10 × 2 =
10 twos are

Oasis School Mathematics Book-1 207

Change into repeated addition: 5×2 =
4×2 = 2+2+2+2

3×2 = 6×2 =

7×2 =

Colour the sets having same meaning with the same colour.

2+2+2 5×2 4 twos 7 times 2

2+2+2+2+2 3×2 6 twos 5 times 2

2+2+2+2 6×2 3 twos 4 times 2
2+2+2+2+2+2 4×2 7 twos 3 times 2

2+2+2+2+2+2+2 7×2 5 twos 6 times 2

Counting by 2's

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
2 20

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Multiplying by 3 (Look and Learn) 2 sets of 3 is 6
2 threes are 6
1 set of 3 is 3 3+3 = 6
1 three is 3 2×3 = 6
1×3=

Complete as above: 5 sets of 3 are
3 sets of 3 are 5 threes are
3 threes are 3+3+3+3+3=
3+3+3= 5×3=
3×3=

8 sets of 3 are Multiplication is the
8 threes are repeated addition.
3 + 3 + 3 + 3 + 3+ 3 + 3 + 3 = 4 threes = 3+3+3+3
8×3=

9 sets of 3 are
9 threes are
3 + 3 + 3 + 3 + 3 + 3+ 3 + 3 + 3 =
9×3=

Oasis School Mathematics Book-1 209

Counting by 3's

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

3 15 27

Multiplying by 4. (Look and Learn)

1 set of 4 are 4 2 sets of 4 are 8
1 fours is 4 2 fours are 8
4 8
1×4= 4+4= 8
2×4=

Complete as above: 7 sets of 4 is
4 sets of 4 is 7 fours are
4 fours are
4+4+4+4= 4+4+4+4+4+4+4
4×4= =

7×4=

5 sets of 4 is 8 sets of 4 is
5 fours are 8 fours are

4+ 4 + 4 + 4 + 4 = 4+4+4+4+4+4
5×4= + 4+ 4 =
8×4=

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Counting by 4.

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

4 3 fours = 8 fours =
2 fours = 7 fours = 6 fours =
5 fours =

Multiplying by 5

1 set of 5 is 5 2 sets of 5 are 10
1 five is 5 2 fives are 10
5 5 + 5 = 10 10
1×5= 10
2 × 5 = 10

Complete as above:
4 sets of 5 are
4 fives are
5+5+5+5=
4×5=

7 sets of 5 are
7 fives are

5 + 5 + 5 + 5+ 5 + 5 + 5 =
7×5=

Oasis School Mathematics Book-1 211

Counting by 5 25 50

5

Write the correct number on the box.

1 fives = 6 fives = 7 fives =
4 fives =
5 fives = 10 fives = 8 fives =

9 fives = 3 fives =

Write the correct number in the box.
2 = 1 × 2 =

2 + 2 = 2 × 2 =

2 + 2 + 2 = 3 × 2 =

2 + 2 + 2 + 2 = 4 × 2 =

2 + 2 + 2 + 2 + 2 = 5 × 2 =

2 + 2 + 2 + 2 + 2 + 2 = 6 × 2 =

2 + 2 + 2 + 2 + 2 + 2 + 2 =7×2 =

2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 =8×2 =

2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 =9×2 =

2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = 10 × 2 =

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Write the correct number in the box.

3 =1×3 =

3 + 3 =2×3 =

3 + 3 + 3 =3×3 =

3 + 3 + 3 + 3 =4×3 =

3 + 3 + 3 + 3 +3 =5×3 =

3 + 3 + 3 + 3 + 3 + 3 =6×3 =

3 + 3 + 3 + 3 + 3 + 3 + 3 =7×3 =

3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 =8×3 =

3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 =9×3 =

3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 = 10 × 3 =

Write the correct number in the box.

4 =1×4 =

4 + 4 = 2 × 4 =

4 + 4 + 4 = 3 × 4 =

4 + 4 + 4 + 4 = 4 × 4 =

4 + 4 + 4 + 4 + 4 = 5 × 4 =

4 + 4 + 4 + 4 + 4 + 4 =6×4 =

4 + 4 + 4 + 4 + 4 + 4 + 4 =7×4 =

4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 =8×4 =

4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 =9×4 =

4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 = 10 × 4 =

Oasis School Mathematics Book-1 213

Write the correct number in the box.

5 =1×5 =

5 + 5 =2×5 =

5 + 5 + 5 =3×5 =

5 + 5 + 5 + 5 =4×5 =

5 + 5 + 5 + 5 + 5 =5×5 =

5 + 5 + 5 + 5 + 5 + 5 =6×5 =

5 + 5 + 5 + 5 + 5 + 5 + 5 =7×5 =

5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 =8×5 =

5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 =9×5 =

5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 10 × 5 =

Fill in the boxes.

2 + 2 + 2 = 3 × 2 = 6
2 + 2 + 2 + 2 = 4 × =
3 + 3 + 3 + 3 = 4 × =
3 + 3 + 3 + 3 + 3 = 5 × =
4 + 4 = 2 × =
4 + 4 + 4 = 3 × =
5 + 5 + 5 + 5 = 4 × =
5 + 5 + 5 + 5 + 5 + 5 = 6 × =

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Multiplication table from 2 to 5

Look and learn.

Multiplication table of 2 Multiplication table of 3
2×1 = 2 3×1 = 3
2×2 = 4 3×2 = 6
2×3 = 6 3×3 = 9
2×4 = 8 3 × 4 = 12
2 × 5 = 10 3 × 5 = 15
2 × 6 = 12 3 × 6 = 18
2 × 7 = 14 3 × 7 = 21
2 × 8 = 16 3 × 8 = 24
2 × 9 = 18 3 × 9 = 27
2 × 10 = 20 3 × 10 = 30

Multiplication table of 3 Multiplication table of 4
4×1 = 4 5 ×1 = 5
4×2 = 8 5 × 2 = 10
4 × 3 = 12 5 × 3 = 15
4 × 4 = 16 5 × 4 = 20
4 × 5 = 20 5 × 5 = 25
4 × 6 = 24 5 × 6 = 30
4 × 7 = 28 5 × 7 = 35
4 × 8 = 32 5 × 8 = 40
4 × 9 = 36 5 × 9 = 45
4 × 10 = 40 5 × 10 = 50

Oasis School Mathematics Book-1 215

Match the following:

4×3
5×2
3×2
3×5

2×4

Write the multiplication facts. Find the product.
3 × 2 =6

×=

×= Count the groups. Count
×=
×= the dots in each group.

∴ 3 × 2 = 6.

Total

Groups Dots in each group

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Fill in the boxes. 2×4= 2×4=
2×4= 3×5= 3×5=
3×5= 2×7= 2×7=
2×7= 3×8= 3×8=
3×8= 2×6= 2×6=
2×6= 3×4= 3×4=
3×4=
34 25
Multiply. 5 ×5 ×2 ×2 ×2
×2
3 45 23
×2 ×6 ×6 ×8 ×7

43
×4 ×6

24 534 4
×9 ×9 ×9 ×8 ×7 ×6

Oasis School Mathematics Book-1 217

Multiplication by Zero

Look and learn.

Number of baskets = 4
Number of apples in each basket = 0
Number of apples in all = 0
∴ 4×0=0

Any number multiplied by zero is always zero.

2×0 = 3×0 = 4×0 = 5×0 =
0×4 = 0×5 = 0×2 = 0×3 =

218 Oasis School Mathematics Book-1

Multiplication by using number line

Look and learn.

3×2

Jump 2 steps 3 times

0 1 2 3 4 5 6 7 8 9 10

Multiply using number line:

4×2= Jump 2 steps 4 times

01 2 34 5 6 7 8 9 10
4×2= 2+ 2 + 2 + 2 Jump 2 steps 5 times

5×2=

01 2 34 56 78 9 10
5×2= + +++

3×3= Jump 3 steps 3 times

01 2 34 56 78 9 10
3×3= ++

2×4= Jump 4 steps 2 times

01 2 34 56 7 8 9 10
2×4= ++
Oasis School Mathematics Book-1 219

Separation of sets

Look and learn.

There are 8 toffees. First Second Third Fourth
Notation of division ÷
Divide those toffees equally
into 4 groups.

What is the number of
toffees in each group? 2

8÷4= 2

There are 9 apples.

Divide those apples equally
among 3 groups.
What is the number of apples in
each group?

9÷3= 3

Complete as above:

There are 12 pencils.
Divide those pencils equally into 4 groups.

Number of pencils in each group =

Hence, 12 ÷ 4 =

There are 10 oranges.

Divide those oranges equally into 5
groups.
Number of oranges in each group =
Hence, 10 ÷ 5 =

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There are 20 marbles.

4 children shared them equally.

Each child gets marbles.

20 ÷ 4 =

There are 16 pencils.

Divide them among 4 children.

Each child gets pencils.

20 ÷ 4 =

Solve the following:
Look and learn.

How many balls are there altogether? 6

How many 2's are there? 3

6÷2= 3

Complete as above:

Make the group of 4. Count how
many such groups are there?

How many marbles are there ? 8
How many 4's are there? 2
8÷4 = 2

Oasis School Mathematics Book-1 221

How many balls are there altogether?

How many 5's are there?

∴ ÷=

How many triangles are there
altogether?
How many 2's are there?
∴ ÷=

How many triangles are there?
How many 3's are there?
∴ ÷=

How many pencils are there
altogether?

How many 4's are there?
∴ ÷=

How many sticks are there

altogether?

How many 5's are there?
∴ ÷=

222 Oasis School Mathematics Book-1

Division by using number lines

Look and learn.

Let's divide 15 by 3.

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

It takes 5 jumps. Starting from 15, jump 3 steps

∴15 ÷ 3 = 5 left till you reach 0.

Divide by using number line:

12 ÷ 3 =

0 1 2 3 4 5 6 7 8 9 10 11 12
∴ 12 ÷ 3 =

12 ÷ 4 =

0 1 2 3 4 5 6 7 8 9 10 11 12
∴ 12 ÷ 4 =

10 ÷ 2 =

0 1 2 3 4 5 6 7 8 9 10 11 12
∴ 10 ÷ 2 =

15 ÷ 5 =

0 1 2 3 4 5 6 7 8 9 10 11 12
∴ 15 ÷ 5 =

Oasis School Mathematics Book-1 223

Make number line in your exercise book and divide:

6÷2= 18 ÷ 2 = 12 ÷ 4 =
8÷2= 6÷3= 16 ÷ 4 =
10 ÷ 2 = 9÷3= 20 ÷ 4 =
12 ÷ 2 = 12 ÷ 3 = 10 ÷ 5 =
14 ÷ 2 = 15 ÷ 3 = 15 ÷ 5 =
16 ÷ 2 = 8÷4= 20 ÷ 5 =

Worksheet

Colour the given figure with the given colour code.

Below 5 5 to 10 Above 10

224 Oasis School Mathematics Book-1

Unit Evaluation Full Marks : 16

1. Count forward by 2. 4
2 20

2. Match the following: 4
Three 3's

Three 2's

Four 5's

Four 4's

3. Write the multiplication facts and write the correct number in
the box. 4

3 + 3 = × = 2 + 2 + 2= × =

4+4+4+4+4= ×=

5+5+5= ×=

4. Observe the given figures and answer the following
questions. 4
How many 2's are in 6?

How many 3's are in 12?

How many 4's are in 8?

How many 5's are in 15?

Oasis School Mathematics Book-1 225

Model Test Paper Full Marks: 100

Attempt all the questions.
1. Tick () the longer object. 2

2. Observe the given figure and tick () the object which is on
the table and cross (×) which is under the table. 1

3. Tick () the object which is near the house and cross (×) the

object which is far from the house. 2

226 Oasis School Mathematics Book-1

4. Count the following objects. 2

5. Write the number names of the following numbers. 2

74

6. Write the following numbers in Devanagari. 2
3785

7. Write the following Devanagari numbers into Hindu Arabic
numbers. 2

8. Circle the bigger number. 2

7 89 3

9. Circle the smaller number. 2

3 47 5

10. Make 10. 2

4 + .......

7 + ....... 10 3 + .......

5 + .......

Oasis School Mathematics Book-1 227

11. Add: 4

7+6= 9+4= 9+7= 13 + 3 =

12. Subtract: 4

7–4= 8–5= 14 – 7 = 12 – 6 =

13. Write the number which comes just before, after and
between. 4

8 85

9 17

14. Count tens and ones and write the number. 3

Tens and Ones =

Tens and Ones =

Tens and Ones =

15. Arrange the following numbers in ascending order. 2

36 53 29

42 51 30

228 Oasis School Mathematics Book-1

16. Arrange the following numbers in descending order. 2

72 63 84

81 83 76

17. Write 'O' for odd numbers and 'E' for even numbers. 2

13 8 5 17 12 6

18. Write the number name of: 4
53 72

46 38

19. Colour the circle of given position: 4

– Third

– Sixth

– Seventh

– Second

20. Count the slanting line, horizontal line and vertical line. 4
Slanting line
Horizontal line
Vertical line

Oasis School Mathematics Book-1 229

21. Colour the triangle by red, circle by blue, rectangle by green
and square by yellow. 4

22. Join the given two dots to make straight line and curved
line. 2

Straight line Curved line

23. Write the correct numbers. 5
4
3 Tens + 6 Ones = 5 Tens + 7 Ones = 4

4 Tens + 5 Ones = 7 Tens + 2 Ones =

6 Tens + 0 Ones =

24. Convert the following numbers into tens and ones.

83 = Tens + Ones

26 = Tens + Ones

37 = Tens + Ones

46 = Tens + Ones

25. Add the following three numbers.

5+4+6 = 6+4+7 =

2+8+7 = 3+7+4 =

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26. Add: 6
43 62 54 72

+24 +37 +34 +23

27. Subtract: 6
83 76 82 56

–23 –54 –71 –24

28. Write M for the activity done in the Morning, D for the activity
done in the Day and N for the activity done at Night. 3

29. Identify the following paper notes. 2

30. Write the order of the days of the week. 4

Sunday Tuesday Monday

Thursday Saturday Friday
Wednesday
Oasis School Mathematics Book-1 231

31. Tick () the heavier object. 2

32. Solve the following verbal problems: 3 × 2 = 6
By how much 18 is greater than 5?

Your father gave you 13 chocolates and
mother gave you 12 more, how many
chocolates do you have now?
There are 16 benches and 4 chairs in
your classroom. How many furnitures
are there altogether?

232 Oasis School Mathematics Book-1