# Knowing Our Numbers – Chapter 1

CBSE Class 6 Mathematics/Model Questions/Extra Questions for Practice

- Write the place and place value of 8 in 78926
- Write the greatest and smallest 4 digit number using the digits 2, 7, 0, 8.
- Write in ascending order: 4852, 8452, 4825 and 4285
- Make the greatest and smallest 4 digit numbers using any four different digits with condition 8 is always at tens place.
- Put comma suitably and write number name according to Indian System of numeration: 58473109
- Write the expanded form of 835049.
- Place comma and write the numeral: Eighty five lakh twenty three thousand ninety two.
- Place comma and write the numeral: Ninety eight million three hundred two thousand one hundred twenty five.
- Find the estimated sum of 798 + 5854
- Find the estimated product of 216 x 4380
- Write Roman numeral of

a) 169

b) 242 - Write the Hindu Arabic numeral of

a) CLVII

b) CDXLIX - Solve using brackets: 215 x 102
- 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?
- If the cost of one wall stand is 4879 rupees, find the cost of one dozen such wall stands?

Answers:

- Place; Thousands

Place Value: 8000 - Greatest number; 8720

Smallest number: 2078 - 4285, 4825, 4852, 8452
- Greatest number: 9786

Smallest number: 1082 - 5, 84, 73,109

Five crore eighty four lakh seventy three thousand one hundred nine. - 835049 = 800000 + 30000 + 5000 + 40 + 9
- 85, 23,092
- 98, 302, 125
- 798 round off to 800

5854 round off to 5900

Estimated sum = 800 + 5900 = 6700 - 216 round off to 200

4380 round off to 4000

Estimated product = 200 x 4000 = 800000 - 169 = 100 + 60 + 9 = CLXIX

242 = 200 + 40 + 2 = CCXLII - a) 157

b) 449 - 215 x 102 = 215 x (100 + 2) = 215 x 100 + 215 x 2 = 21500 +430

= 21930 - 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 - Cost of one wall stand = 4879

Cost of one dozen wall stands = 4879 x 12 = 58548