Exercise 1.1

Class 6 Mathematics Chapter 1 |
Knowing Our Numbers | Exercise 1.1

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) 1 lakh =10 ten thousand
(b) 1 million = 10 hundred thousand
(c) 1 crore = 10 ten lakh
(d) 1 crore = 10 million
(e) 1 million = 10 lakh

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

Question 3: Insert commas suitable 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: Eight-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.

Question 4:
Insert commas suitable and write the names according to International system of numeration:
(a) 78921092
(b) 7452283
(c) 99985102
(d) 48049831

Answer:
(a) 78,921,092 : Seventy-eight million nine hundred twenty-one thousand ninety-two
(b) 7,452,483: 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