# Knowing Our Numbers – Chapter 1CBSE Class 6 Mathematics/Model Questions/Extra Questions for Practice

1. Write the place and place value of 8 in 78926
2. Write the greatest and smallest 4 digit number using the digits 2, 7, 0, 8.
3. Write in ascending order: 4852, 8452, 4825 and 4285
4. Make the greatest and smallest 4 digit numbers using any four different digits with condition 8 is always at tens place.
5. Put comma suitably and write number name according to Indian System of numeration: 58473109
6. Write the expanded form of 835049.
7. Place comma and write the numeral: Eighty five lakh twenty three thousand ninety two.
8. Place comma and write the numeral: Ninety eight million three hundred two thousand one hundred twenty five.
9. Find the estimated sum of 798 + 5854
10. Find the estimated product of 216 x 4380
11. Write Roman numeral of
a) 169
b) 242
12. Write the Hindu Arabic numeral of
a) CLVII
b) CDXLIX
13. Solve using brackets: 215 x 102
14. Meera Book store sold 2134 books on Monday, 2343 books on Tuesday and 1987 books on Wednesday. How many books sold in all three days?
15. If the cost of one wall stand is 4879 rupees, find the cost of one dozen such wall stands?

1. Place; Thousands
Place Value: 8000
2. Greatest number; 8720
Smallest number: 2078
3. 4285, 4825, 4852, 8452
4. Greatest number: 9786
Smallest number: 1082
5. 5, 84, 73,109
Five crore eighty four lakh seventy three thousand one hundred nine.
6. 835049 = 800000 + 30000 + 5000 + 40 + 9
7. 85, 23,092
8. 98, 302, 125
9. 798 round off to 800
5854 round off to 5900
Estimated sum = 800 + 5900 = 6700
10. 216 round off to 200
4380 round off to 4000
Estimated product = 200 x 4000 = 800000
11. 169 = 100 + 60 + 9 = CLXIX
242 = 200 + 40 + 2 = CCXLII
12. a) 157
b) 449
13. 215 x 102 = 215 x (100 + 2) = 215 x 100 + 215 x 2 = 21500 +430
= 21930
14. Number of books sold on Monday = 2134
Number of books sold on Tuesday = 2343
Number of books sold on Wednesday = 1987
Total number of books sold = 6464
15. Cost of one wall stand = 4879
Cost of one dozen wall stands = 4879 x 12 = 58548