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Chapter 1 Knowing Our Numbers Ex 1.1 Solutions

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 - 1 : -

(a) 10

(b) 10

(c) 10

(d) 10

(e) 10

Question - 2 : -
Place commas correctly and write the numerals:
(a) Seventry-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 - 2 : -

(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 - 3 : -

(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 - 4 : -

(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

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