NCERT solution class 6 mathematics Chapter 1 Knowing Our Numbers

Exercise 1.1

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Ex-1.1
Ex-1.2
Ex-1.3

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Introduction

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Page No 12:

Q 1 - Ex 1.1 - Knowing Our Numbers - Chapter 1 - Class 6th NCERT Maths

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Question 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.

Answer:

(a) lakh =ten thousand
(1 lakh = 1,00,000 and ten thousand = 10,000)
(b) 1 million =hundred thousand
(1 million = 1,000,000 and 1 hundred thousand = 1, 00,000)
(c) 1 crore = ten lakh
(1 crore = 1,00,00,000 and Ten lakh = 10,00,000)
(d) 1 crore = million
(1 crore = 1,00,00,000 and 1 million = 1,000,000)
(e) 1 million = lakh
(1 million = 1,000,000 and 1 lakh = 1,00,000)

Q 2 - Ex 1.1 - Knowing Our Numbers - Chapter 1 - Class 6th NCERT Maths

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Question 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.

Answer:

(a) 73,75,307
(b) 9,05,00,041
(c) 7,52,21,302
(d) 58,423,202
(e) 23,30,010

Q 3 - Ex 1.1 - Knowing Our Numbers - Chapter 1 - Class 6th NCERT Maths

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Question 3:

Insert commas suitably and write the names according to Indian System of Numeration:
(a). 87595762 (b). 8546283
(c). 99900046 (d). 98432701

Answer:

(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

Q 4 - Ex 1.1 - Knowing Our Numbers - Chapter 1 - Class 6th NCERT Maths

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Question 4:

Insert commas suitably and write the names according to International System of Numeration:
(a). 78921092 (b). 7452283
(c). 99985102 (c). 48049831

Answer:

(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