NCERT Solutions for Class 6 Chapter 1: Knowing Our Numbers Exercise 1.1
1. Fill in the blanks:
(a) 1 lakh = ………….. ten thousand.
(b) 1 million = ………… hundred thousand.
(c) 1 crore = ………… ten lakh.
(d) 1 crore = ………… million.
(e) 1 million = ………… lakh.
Solutions:
(a) 1 lakh = 10 ten thousand
= 1,00,000
(b) 1 million = 10 hundred thousand
= 10,00,000
(c) 1 crore = 10 ten lakh
= 1,00,00,000
(d) 1 crore = 10 million
= 1,00,00,000
(e) 1 million = 10 lakh
= 1,000,000
2. Place commas correctly and write the numerals:
(a) Seventy-three lakh seventy-five thousand three hundred seven.
(b) Nine crore five lakh forty-one.
(c) Seven crore fifty-two lakh twenty-one thousand three hundred two.
(d) Fifty-eight million four hundred twenty-three thousand two hundred two.
(e) Twenty-three lakh thirty thousand ten.
Solutions:
(a) 73,75,307
(b) 9,05,00,041
(c) 7,52,21,302
(d) 5,84,23,202
(e) 23,30,010
3. Insert commas suitably and write the names according to Indian System of Numeration:
(a) 87595762 (b) 8546283 (c) 99900046 (d) 98432701
Solutions:
(a) 8,75,95,762 – Eight crore seventy-five lakh ninety-five thousand seven hundred sixty-two
(b) 85,46,283 – Eighty-five lakh forty-six thousand two hundred eighty-three
(c) 9,99,00,046 – Nine crore ninety-nine lakh forty-six
(d) 9,84,32,701 – Nine crore eighty-four lakh thirty-two thousand seven hundred one
4. Insert commas suitably and write the names according to International System of Numeration:
(a) 78921092 (b) 7452283 (c) 99985102 (d) 48049831
Solutions:
(a) 78,921,092 – Seventy-eight million nine hundred twenty-one thousand ninety-two
(b) 7,452,283 – Seven million four hundred fifty-two thousand two hundred eighty-three
(c) 99,985,102 – Ninety-nine million nine hundred eighty-five thousand one hundred two
(d) 48,049,831 – Forty-eight million forty-nine thousand eight hundred thirty-one
