Welcome to the NCERT Solutions for Class 6 Maths Chapter 1!

In this exercise, we will explore the fundamental concepts of numbers and their representations. Counting objects and things around us becomes much easier when we understand numbers. For instance, we can effortlessly count the number of students in a class and represent that count in numerical form.

1. Knowing Our Numbers
Exercise-1.1

1. Fill in the Blanks

  1. (a) 1 lakh = ............ ten thousand.
  2. (b) 1 million = ........... hundred thousand.
  3. (c) 1 crore = ........... ten lakh.
  4. (d) 1 crore = ........... million.
  5. (e) 1 million = ........... lakh.

Solutions:

  1. (a) 1 lakh = 10 ten thousand = 1,00,000
  2. (b) 1 million = 10 hundred thousand = 10,00,000
  3. (c) 1 crore = 10 ten lakh = 1,00,00,000
  4. (d) 1 crore = 10 million = 1,00,00,000
  5. (e) 1 million = 10 lakh = 10,00,000

2. Place Commas Correctly and Write the Numerals

  1. (a) Seventy-three lakh seventy-five thousand three hundred seven.
  2. (b) Nine crore five lakh forty-one.
  3. (c) Seven crore fifty-two lakh twenty-one thousand three hundred two.
  4. (d) Fifty-eight million four hundred twenty-three thousand two hundred two.
  5. (e) Twenty-three lakh thirty thousand ten.

Solutions:

  1. (a) The numeral of seventy-three lakh seventy-five thousand three hundred seven is 73,75,307.
  2. (b) The numeral of nine crore five lakh forty-one is 9,05,00,041.
  3. (c) The numeral of seven crore fifty-two lakh twenty-one thousand three hundred two is 7,52,21,302.
  4. (d) The numeral of fifty-eight million four hundred twenty-three thousand two hundred two is 5,84,23,202.
  5. (e) The numeral of twenty-three lakh thirty thousand ten is 23,30,010.

3. Insert Commas Suitably and Write the Names (Indian System of Numeration)

  1. (a) 87595762
  2. (b) 8546283
  3. (c) 99900046
  4. (d) 98432701

Solutions:

  1. (a) 87595762 – Eight crore seventy-five lakh ninety-five thousand seven hundred sixty-two.
  2. (b) 8546283 – Eighty-five lakh forty-six thousand two hundred eighty-three.
  3. (c) 99900046 – Nine crore ninety-nine lakh forty-six.
  4. (d) 98432701 – Nine crore eighty-four lakh thirty-two thousand seven hundred one.

4. Insert Commas Suitably and Write the Names (International System of Numeration)

  1. (a) 78921092
  2. (b) 7452283
  3. (c) 99985102
  4. (d) 48049831

Solutions:

  1. (a) 78921092 – Seventy-eight million nine hundred twenty-one thousand ninety-two.
  2. (b) 7452283 – Seven million four hundred fifty-two thousand two hundred eighty-three.
  3. (c) 99985102 – Ninety-nine million nine hundred eighty-five thousand one hundred two.
  4. (d) 48049831 – Forty-eight million forty-nine thousand eight hundred thirty-one.