Page 21 - Start Up Mathematics_5
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3. Choose the correct option.
(a) 253 rounded off to the nearest 10 is:
(i) 250 (ii) 240 (iii) 260 (iv) 255
(b) 781 rounded off to the nearest 100 is:
(i) 790 (ii) 780 (iii) 800 (iv) 700
(c) 1,855 rounded off to the nearest 100 is:
(i) 1,860 (ii) 1,850 (iii) 1,800 (iv) 1,900
(d) 35,810 rounded off to the nearest 1,000 is:
(i) 36,000 (ii) 35,000 (iii) 35,500 (iv) 35,800
(e) 5,26,433 rounded off to the nearest 1,000 is:
(i) 6,00,000 (ii) 5,00,000 (iii) 5,26,000 (iv) 5,27,000
Word Problems
1. Rahul’s landline number is 26234875. Write its number name both in Indian and
International system.
2. Which is the largest 8-digit number? If we add 1 to it, what will it become?
3. Write the smallest and the largest 9-digit number that can be formed using the digits
6, 2, 0, 8, 9, 1, 4, 7 and 3. Round off both the numbers to the nearest 1,000.
4. Write the smallest and the largest 5-digit numbers that can be formed using the digits
5, 3, 0, 8 and 7 so that no digit is repeated.
5. The radius of the sun is approximately 6,95,000 km. Write the number name in the
International number system.
6. The distance of the moon from the earth is approximately 38,44,67,000 m. Write the
number name in the Indian number system.
7. The height of Mount Everest is 8,848 m. Round it off to the nearest 1,000.
8. What is the number 2 more than the smallest 9-digit number?
9. Total cash available in a bank is ` 2 crore 48 thousand 7 hundred and twenty. Write
the amount in numerals using the Indian and International place value systems.
10. Write the smallest and the largest 7-digit numbers that can be formed using the digits
6 two times, 0 once, 5 twice, 3 and 9 only once.
11. Write the smallest odd number that can be formed using the digits 8, 7, 5, 3, 0, 2, 1, 4.
12. Write the successor and the predecessor of the greatest 6-digit number.
13. The population of city A is 50,68,973, city B is 50,83,214 and city C is 51,29,860. Arrange
them in ascending order. Which city has the largest population?
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