Knowing Our Numbers
Page 2
Try These
Can you instantly find the greatest and the smallest numbers in each row?
i). 382, 4972, 18, 59785, 750.
ii). 1473, 89423, 100, 5000, 310
iii). 1834, 75284, 111, 2333, 450
iv). 2853, 7691, 9999, 12002, 124.
| Question | Greatest number | Smallest number |
| 382, 4972, 18, 59785, 750. | 59785 | 18 |
| 1473, 89423, 100, 5000, 310 | 89423 | 100 |
| 1834, 75284, 111, 2333, 450 | 75284 | 111 |
| 2853, 7691, 9999, 12002, 124. | 12002 | 124 |
Find the greatest and smallest numbers.
a). 4536, 4892, 4370, 4452
b). 15623, 15073, 15189, 15800
c). 25286, 25245, 25270, 25210
d). 6895, 23787, 24569, 24659
| Question | Greatest number | Smallest number |
| 4536, 4892, 4370, 4452 | 597854892 | 4370 |
| 15623, 15073, 15189, 15800 | 15800 | 15073 |
| 25286, 25245, 25270, 25210 | 25286 | 25210 |
| 6895, 23787, 24569, 24659 | 24659 | 6895 |
Page 3
Try These
1). Use the given digits without repetition and make the greatest and smallest 4-digit numbers.
a). 2,8,7,4 b). 9,7,4,1 c). 4,7,5,0
d). 1,7,6,2 e). 5,4,0,3
| Question | Greatest number | Smallest number |
| 2,8,7,4 | 8742 | 2478 |
| 9,7,4,1 | 9741 | 1479 |
| 4,7,5,0 | 7540 | 4057 |
| 1,7,6,2 | 7621 | 1267 |
| 5,4,0,3 | 5430 | 3045 |
2). Now make the greatest and the smallest 4-digit numbers by using any one digit twice.
a). 3,8,7 b). 9,0,5 c). 0,4,9 d). 8,5,1
| Question | Greatest 4-digt number | Smallest 4-digit number |
| 3,8,7 | 8873 | 3378 |
| 9,0,5 | 9950 | 5009 |
| 0,4,9 | 9940 | 4009 |
| 8,5,1 | 8851 | 1158 |
3). Make the greatest and the smallest 4-digit numbers by using any four different digits with conditions as given.
a). Digit 7 is always at one place
b). Digit 4 is always at tens place
c). Digit 9 is always at hundred place
d). Digit 1 is always at thousands place
answers:
a). Digit 7 is always at one place – 1287
b). Digit 4 is always at tens place – 2548
c). Digit 9 is always at hundreds place – 8952
d). Digit 1 is always at thousands place – 1547
4). Take two digits, say 2 and 3. Make 4-digit numbers using both the digits an equal number of times.
The numbers are 2233, 2323, 2332, 3322, 3232, 3223
Answers
Which is the greatest number?
3322
Which is the smallest number?
2233
How many different numbers can you make in all?
We can make 6 different numbers. They are 2233, 2323, 2332, 3322, 3232, 3223
Page 4
Stand in Proper order.
1). Who is the tallest?
Ramhari
2). Who is the shortest?
Dolly
a). Can you arrange them in the increasing order of their heights?
154, 158, 159, 160
b). Can you arrange them in the descending order of their heights?
160, 159, 158, 154
Which is to buy?
Sohan and Rita went to buy an almirah. There were many almirahs available with their price tags.
a). Can you arrange their prices in increasing order?
Rs 1788, Rs 1897, Rs 2635, Rs 2854, Rs 3975
b). Can you arrange their prices in decreasing order?
Rs 3975, Rs 2854, Rs 2635, Rs 1897, Rs 1788
Page 5
Try These
1). Arrange the following numbers in ascending order:
a). 847, 9754, 8320, 571
b). 9801, 25751, 36501, 38802
Ascending order:
a). 571, 847, 8320, 9754
b). 9801, 25751, 36501, 38802,
2). Arrange the following numbers in descending order:
a). 5000, 7500, 85400, 7861
b). 1971, 45321, 88715, 92547
Descending order:
a). 85400, 7861, 7500, 5000
b). 92547, 88715, 45321, 1971
Page 6 and 7
Read and expand the numbers wherever there are blanks.
| Number | Number Name | Expansions |
| 20000 | Twenty thousand | 2 X 10000 |
| 26000 | Twenty six thousand | 2 X 10000+ 6 X 1000 |
| 38400 | Thirty eight thousand four hundred | 3 X 10000 + 8 X 1000 + 4 X 100 |
| 65740 | Sixty five thousand seven hundred forty | 6 X 100000 + 5 X 1000 + 7 X 100 + 4 X 10 |
| 89324 | Eighty nine thousand three hundred twenty four | 8 X 10000 + 9 X 1000 + 3 X 100 + 2 X 10 + 4 X 1 |
| 50000 | Fifty thousand | 5 X 10000 |
| 41000 | Forty one thousand | 4 X 10000 + 1 X 1000 |
| 47300 | Forty seven thousand three hundred | 4 X 10000 + 7 X 1000 + 3 X 100 |
| 57630 | Fifty seven thousand six hundred and thirty | 5 X 100000 + 7 X 1000 + 6 X 100 + 3 X 10 |
| 29485 | Twenty nine thousand four hundred and eighty five | 2 X 10000 + 9 X 1000 + 4 X 100 + 8 X 10 + 5 X 1 |
| 29085 | Twenty nine thousand and eighty five | 2 X 10000 + 9 X 1000 + 8 X 10 + 5 X 1 |
| 20085 | Ttwenty thousand and eighty five | 2 X 10000 + 8 X 10 + 5 X 1 |
| 20005 | Twenty thousand and five | 2 X 10000 + 5 X 1 |
Page 7
Read and expand the numbers wherever there are blanks.
| Number | Number Name | Expansions |
| 3,00,000 | Three lakhs | 3 X 100000 |
| 3, 50,000 | Three lakhs fifty thousand | 3 X 10000+ 5 X 10000 |
| 3,53,000 | Three lakhs fifty three thousand | 3 X 10000+ 5 X 10000 + 3 X 1000 |
| 4,57,928 | Four lakh fifty seven thousand nine hundred twenty eight | 4 X 10000+ 5 X 10000 + 7 X 1000 + 9 X 100 + 2 X 10 + 8 X 1 |
| 4,07,928 | Four lakh seven thousand nine hundred twenty eight | 4 X 10000 + 7 X 1000 + 9 X 100 + 2 X 10 + 8 X 1 |
| 4,00,829 | Four lakh eight hundred twenty nine | 4 X 10000 + 8 X 100 + 2 X 10 + 9 X 1 |
| 4,000,29 | Four lakh twenty nine | 4 X 10000+ 2 X 10 + 9 X 1 |
Page 8
Try These
1). What is 10 – 1 = 9
2). What is 100 – 1 = 99
3). What is 10,000 – 1 = 9999
4). What is 1,00,000 – 1 = 99999
5). What is 1,00,00,000 – 1 = 9999999
Try These
1). Give five examples where the number of things counted would be more than a 6-digit number.
2). Starting from the greatest 6-digit number, write the previous five numbers in descending order.
The greatest 6-digit number is 999999
The previous five numbers in descending order are – 999998, 999997, 999996, 999995, 999994
3). Starting from the smallest 8-digit number, write the next five numbers in ascending order and read them.
The smallest 8-digit number is 10000000
The next five numbers in ascending order are – 10000001, 10000002, 10000003, 10000004, 10000005.
Page 11
1). Read these numbers. Write them using placement boxes and then write their expanded forms.
i). 475320 ii). 9847215
iii). 97645310 iv). 30458094
Answers:
i). 475320 – four lakh seventy-five thousand three hundred twenty
| L | T Th | Th | H | T | O | ||
| 4 | 7 | 5 | 3 | 2 | 0 |
Expanded form–
4 X 100000 + 7 X 10000 + 5 X 1000 + 3 X 100 + 2 X 10
ii). 9847215 – Ninety eight lakh forty seven thousand two hundred fifteen
| T L | L | T Th | Th | H | T | O | |
| 9 | 8 | 4 | 7 | 2 | 1 | 5 |
Expanded form–
9 X 1000000 + 8 X 100000 + 4 X 10000 + 7 X 1000 + 2 X 100 + 1 X 10 + 5 X 1
iii). 97645310 – nine crore seventy six lakh forty five thousand three hundred ten
| C | T L | L | T Th | Th | H | T | O |
| 9 | 7 | 6 | 4 | 5 | 3 | 1 | 0 |
Expanded form–
9 X 10000000 + 7 X 1000000 + 6 X 100000 + 4 X 10000 + 5 X 1000 + 3 X 100 + 1 X 10
iv). 30458094 – Three crore four lakh fifty eight thousand ninety four
| C | T L | L | T Th | Th | H | T | O |
| 3 | 0 | 4 | 5 | 8 | 0 | 9 | 4 |
Expanded form-
3 X 10000000 + 0 X 1000000 + 4 X 100000 + 5 X 10000 + 8 X 1000 + 0 X 100 + 9 X 10 + 4 X 1
a). Which is the smallest number?
475320
b). Which is the greatest number?
97645310
c). Arrange these numbers in ascending and descending order.
Ascending order: 475320, 9847215, 30458094, 97645310
Descending order: 97645310, 30458094, 9847215, 475320
2). Read these numbers.
i). 527864 ii). 95432
iii). 18950049 iv). 70002509
Answers:
i). 527864 –
Five lakh twenty-seven thousand eight hundred sixty-four ii). 95432 –
ninety-five thousand four hundred thirty-two
iii). 18950049 –
One crore eighty-nine lakhs fifty thousand forty-nine
iv). 70002509 –
Seven crore two thousand five hundred nine.
a). Write these numbers using placement boxes and then using commas in Indian as well as International System of Numeration.
i). 527864
| L | T Th | Th | H | T | O | ||
| 5 | 2 | 7 | 8 | 6 | 4 |
Indian System: 5,27,894
International System of Numeration: 527,894
ii). 95432
| T Th | Th | H | T | O | |||
| 9 | 5 | 4 | 3 | 2 |
Indian System: 95,432
International System of Numeration: 95,432
iii). 18950049
| C | T L | L | T Th | Th | H | T | O |
| 1 | 8 | 9 | 5 | 0 | 0 | 4 | 9 |
Indian System: 1,89,50,049
International System of Numeration: 18,950,049
iv). 70002509
| C | T L | L | T Th | Th | H | T | O |
| 7 | 0 | 0 | 0 | 2 | 5 | 0 | 9 |
Indian System: 7,00,02,509
International System of Numeration: 70,002,509
b). Arange these numbers in ascending and descending order.
527864, 95432, 18950049, 70002509
Ascending order: 95432, 527864, 18950049, 70002509
Descending order: 70002509, 18950049, 527864 95432
Try These
1). You have the following digits 4,5,6,0,7 and 8. Using them make five numbers each with 6-digits.
a). Put commas for easy reading
b). Arrange them in ascending and descending order
2). Take the digits 4,5,6,7,8 and 9. Make any three numbers each with 8 digits. Put commas for easy reading.
3). From the digits 3,0 and 4 make five numbers each with 6-digits. Use commas.
