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NCERT · Class 6 · Maths

Chapter 1: Knowing Our Numbers

Practice each question, then open the answer or worked solution.

Questions

4 questions
Q1Written answer

Fill in the blanks:

(a) 1 lakh = ………….. ten thousand.

(b) 1 million = ………… hundred thousand.

(c) 1 crore = ………… ten lakhs.

(d) 1 crore = ………… million.

(e) 1 million = ………… lakhs.

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Worked solution

(a) 1 lakh = 10 ten thousand

= 1,00,000

(b) 1 million = 10 hundred thousand

= 10,00,000

(c) 1 crore = 10 ten lakhs

= 1,00,00,000

(d) 1 crore = 10 million

= 1,00,00,000

(e) 1 million = 10 lakhs

= 1,000,000

Q2Written answer

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

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Worked solution

(a) The numeral of seventy three lakh seventy five thousand three hundred seven is 73,75,307

(b) The numeral of nine crore five lakh forty one is 9,05,00,041

(c) The numeral of seven crore fifty two lakh twenty one thousand three hundred two is 7,52,21,302

(d) The numeral of fifty eight million four hundred twenty three thousand two hundred two is 5,84,23,202

(e) The numeral of twenty three lakh thirty thousand ten is 23,30,010

Q3Written answer

Insert commas suitably and write the names according to the Indian System of Numeration:

(a) 87595762 (b) 8546283 (c) 99900046 (d) 98432701

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Worked solution

(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

Q4Written answer

Insert commas suitably and write the names according to the International System of Numeration:

(a) 78921092 (b) 7452283 (c) 99985102 (d) 48049831

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Worked solution

(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