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# Class 5 Number System

Recap of Number System

Place Value of 7-Digit Number

Place Value of 8-Digit Number

Place Value of 9-Digit Number

Comparison of Large Numbers

Number System Test

Number System Worksheet

Answer Sheet

## Recap of Number System

In class IV, we learnt up to 6-digit numbers. The smallest 6-digit number is 100000, and it is read as One Lakh. In international system it is read as One hundred thousand.The largest 6-digit number is 999999, and it is read as Nine Lakh Ninety Nine Thousand Nine Hundred Ninety Nine. In international system it is read as Nine Hundred Ninety Nine Thousand Nine Hundred Ninety Nine.

## Place Value of 7-Digit Number

Place value table is given below with some examples.

Number Ten-Lakh Lakh Ten-Thousands Thousands Hundreds Tens Ones
1100251 1 1 0 0 2 5 1
2106972 2 1 0 6 9 7 2
4675231 4 6 7 5 2 3 1
9999999 9 9 9 9 9 9 9

1100251 Eleven Lakh Two Hundred Fifty One

2106972 Twenty One Lakh Six Thousand Nine Hundred Seventy Two

4675231 Forty Six Lakh Seventy Five Thousand Two Hundred Thirty One

9999999 Ninety Nine Lakh Ninety Nine Thousand Nine Hundred Ninety Nine,

It is the largest 7-digit number.

Number Millions Hundred-Thousands Ten-Thousands Thousands Hundreds Tens Ones
1100251 1 1 0 0 2 5 1
2106972 2 1 0 6 9 7 2
4675231 4 6 7 5 2 3 1
9999999 9 9 9 9 9 9 9

1100251 One Million One Hundred Thousand Two Hundred Fifty One

2106972 Two Million One Hundred Six Thousand Nine Hundred Seventy Two

4675231 Four Million Six Hundred Seventy Five Thousand Two Hundred Thirty One

9999999 Nine Million Nine Hundred Ninety Nine Thousand Nine Hundred Ninety Nine

## Place Value of 8-Digit Number

Place value table is given below with some examples.

Number Crores Ten-Lakh Lakh Ten-Thousands Thousands Hundreds Tens Ones
21597516 2 1 5 9 7 5 1 6
53706972 5 3 7 0 6 9 7 2
84675735 8 4 6 7 5 7 3 5
99999999 9 9 9 9 9 9 9 9

21597516 Two Crores Fifteen Lakh Ninety Seven Thousand Five Hundred Sixteen

53706972 Five Crores Thirty Seven Lakh Six Thousand Nine Hundred Seventy Two

84675735 Eight Crores Forty Six Lakh Seventy Five Thousand Seven Hundred Thirty Five

99999999 Nine Crores Ninety Nine Lakh Ninety Nine Thousand Nine Hundred Ninety Nine,

it is the largest 8-digit number.

Number Ten-Millions Millions Hundred-Thousands Ten-Thousands Thousands Hundreds Tens Ones
21597516 2 1 5 9 7 5 1 6
53706972 5 3 7 0 6 9 7 2
84675735 8 4 6 7 5 7 3 5
99999999 9 9 9 9 9 9 9 9

21597516 Twenty One Million Five Hundred Ninety Seven Thousand Five Hundred Sixteen

53706972 Fifty Three Million Seven Hundred Six Thousand Nine Hundred Seventy Two

84675735 Eighty Four Million Six Hundred Seventy Five Thousand Seven Hundred Thirty Five

99999999 Ninety Nine Million Nine Hundred Ninety Nine Thousand Nine Hundred Ninety Nine

## Place Value of 9-Digit Number

Place value table is given below with some examples.

321597516 Thirty Two Crore Fifteen Lakh Ninety Seven Thousand Five Hundred and Sixteen

553706972 Fifty Five Crore Thirty Seven Lakh Six Thousand Nine Hundred and Seventy Two

784675735 Seventy Eight Crore Forty Six Lakh Seventy Five Thousand Seven Hundred and Thirty Five
999999999 Ninety Nine Crore Ninety Nine Lakh Ninety Nine Thousand Nine Hundred Ninety Nine,

it is the largest 9-digit number.

Number Ten-Crores Crores Ten-Lakh Lakh Ten-Thousands Thousands Hundreds Tens Ones
321597516 3 2 1 5 9 7 5 1 6
553706972 5 5 3 7 0 6 9 7 2
784675735 7 8 4 6 7 5 7 3 5
99999999 9 9 9 9 9 9 9 9 9

321597516 Thirty Two Crore Fifteen Lakh Ninety Seven Thousand Five Hundred and Sixteen

553706972 Fifty Five Crore Thirty Seven Lakh Six Thousand Nine Hundred and Seventy Two

784675735 Seventy Eight Crore Forty Six Lakh Seventy Five Thousand Seven Hundred and Thirty Five

999999999 Ninety Nine Crore Ninety Nine Lakh Ninety Nine Thousand Nine Hundred Ninety Nine,

it is the largest 9-digit number.

## Comparison of Large Numbers

To compare the large numbers, we follow the same rules that we follow in case of small numbers.

1. A number containing more digits is always greater than the number containing less digits.

2. If two numbers contain the same number of digits, we compare them by the leftmost digits, if they are same,

we compare them by next digits from left and so on.

Let s have a look at some examples.

Example 1. Compare 2487321 and 783453.

Solution. 2487321 is having 7 digits and 783453 is having 6 digits. So, 2487321 is greater than 783453.

Example 2. Compare 78673245 and 78766789.

Solution. 78673245 and 78766789 both are having 8 digits. So, from the number of digits we can not conclude that which number is greater. Left most two digits of both the numbers are 78, that means we can not conclude which number is greater. Comparing the next digits of both the numbers i.e. 7 > 6, so 78766789 is greater than 78673245.

## Number System Test

Number System Test - 1

Number System Test - 2

## Class-5 Number System Worksheet

Number System Worksheet - 1

Number System Worksheet - 2

Number System Worksheet - 3

Number System Worksheet - 4

Number System Worksheet - 5

## Answer Sheet

Number-System-AnswerDownload the pdf

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