 # Reading, Understanding, Forming and Writing Numbers

Mathematics is used everywhere in our day to day activities. Every day, we make use of numbers in reading, writing, calculating and measuring

different units of measurements.

## Numbers from 1 – 99.

Reading, Understanding, and Writing Numbers from 1 – 9.

1

One

2

Two

3

Three

4

Four

5

Five

6

Six

7

Seven

8

Eight

9

Nine

From the above table, we have learnt and understood numbers from 1 to 9 in digits and words. All these are one-digit numbers.

• One-digit numbers are called ones or units.
• The first one-digit number is 1, so it is the smallest one-digit number.
• The last one-digit number is 9, which is the greatest one-digit number.

Reading, Understanding, and Writing Numbers from 10 – 99.

By adding 1 more to 9, we get 10, and we call it ten in words.

10

Ten

20

Twenty

30

Thirty

40

Forty

50

Fifty

11

Eleven

21

Twenty One

31

Thirty One

41

Forty One

51

Fifty-one

12

Twelve

22

Twenty-Two

32

Thirty-Two

42

Forty-Two

52

Fifty Two

13

Thirteen

23

Twenty Three

33

Thirty-Three

43

Forty-Three

53

Fifty Three

14

Fourteen

24

Twenty Four

34

Thirty Four

44

Forty Four

54

Fifty Four

15

Fifteen

25

Twenty Five

35

Thirty Five

45

Forty Five

55

Fifty Five

16

Sixteen

26

Twenty Six

36

Thirty Six

46

Forty Six

56

Fifty Six

17

Seventeen

27

Twenty Seven

37

Thirty Seven

47

Forty Seven

57

Fifty Seven

18

Eighteen

28

Twenty Eight

38

Thirty Eight

48

Forty Eight

58

Fifty Eight

19

Nineteen

29

Twenty Nine

39

Thirty Nine

49

Forty Nine

59

Fifty Nine

60

Sixty

70

Seventy

80

Eighty

90

Ninety

61

Sixty One

71

Seventy One

81

Eighty One

91

Ninety One

62

Sixty Two

72

Seventy Two

82

Eighty Two

92

Ninety Two

63

Sixty Three

73

Seventy Three

83

Eighty Three

93

Ninety Three

64

Sixty Four

74

Seventy Four

84

Eighty Four

94

Ninety Four

65

Sixty Five

75

Seventy Five

85

Eighty Five

95

Ninety Five

66

Sixty Six

76

Seventy Six

86

Eighty Six

96

Ninety Six

67

Sixty Seven

77

Seventy Seven

87

Eighty Seven

97

Ninety Seven

68

Sixty Eight

78

Seventy Eight

88

Eighty Eight

98

Ninety Eight

69

Sixty Nine

79

Seventy Nine

89

Eighty Nine

99

Ninety Nine

From the above table, we have learned and understood numbers from 10 to 99 in digits and words. All these are tens digit numbers.

• Two-digit numbers are called tens.
• The first two-digit number is 10, so it is the smallest two-digit number.
• The last two-digit number is 99, and so it is the greatest two number.

Reading, Understanding, and Writing Three-Digits Numbers

By adding 1 more to 99, we get 100, and we call it a hundred or one hundred in words.

Let us know the three-digit numbers or hundred numbers.

100

101

102

103

104

105

106

107

108

109

Similarly, by adding 1 to the numbers from 110 and above, we can get numbers up to 999.

• Three-digit numbers are called hundreds.
• The first three-digit number is 100, so it is the smallest three-digit number.
• The last three-digit number is 999, and so it is the greatest three-digit number.

Reading, Understanding, and Writing Four Digits Numbers

By adding 1 more to 999, we get 1000, and we call it thousand or one thousand in words.

Let us know the four-digit numbers or thousand numbers.

1000

1001

1002

1003

1004

1005

1006

1007

1008

1009

• Four-digit numbers are called thousands.
• The first four-digit number is 1001 and so it is the smallest four-digit number.
• The last four-digit number is 9999 and so it is the greatest four-digit number.

### Place Value

We have learned about one-digit numbers. The numbers 1 to 9 are all one-digit numbers. We call them units or ones.

Let us learn the place value of digits in two-digit numbers. The numbers 10 to 99 are all two-digit numbers. We call them tens.

For example- 29

Here, the place value of 2 is tens, and 9 is units or ones.

Let us learn the place value of digits in three-digit numbers.

The numbers 100 to 999 are all three-digit numbers. We call them hundreds.

For example – 365

Here, the place value of 3 is hundreds, 6 is tens, and 5 is units or ones.

### Expanded Form of Numbers

To know the place value of digits of a number, we look at the number of digits on the right side of that digit and put the same number of zeros to the right of that digit.

The place value of zero (0) is always ‘0’ in all the places.

In the number 95:

The place value of 9 is 90, and 5 is 5.

In the expanded form, 95 is written as 95 = 90 + 5

Similarly,

In the number 471:

The place value of 4 is 400

The place value of 7 is 70

The place value of 1 is 1

In the expanded form, 471 is written as 471 = 400 + 70 + 1

In the number 2896:

The place value of 2 is 2000

The place value of 8 is 800

The place value of 9 is 90

The place value of 6 is 6

In the expanded form, 2896 is written as 2896 = 2000 + 800 + 90 + 6.

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