Knowing Our Numbers
Exercise 1.1
Ex 1.1- Question 1.
1. Fill in the blanks:
(1) 1 lakh = __________ ten thousand.
(2) 1 million = __________ hundred thousand.
(3) 1 crore =__________ ten lakh.
(4) 1 crore = __________ million.
(5) 1 million =_____________lakh.
Solution-
(1) 1 lakh = ten ten thousand.
(2) 1 million = ten hundred thousand.
(3) 1 crore = ten ten lakh.
(4) 1 crore = ten million.
(5) 1 million = ten lakh.
Ex 1.1- Question 2.
2. Place commas correctly and write the numerals:
(1) Seventy-three lakh seventy-five thousand three hundred seven.
(2) Nine crore five lakh forty-one.
(3) Seven crores fifty-two lakh twenty-one thousand three hundred two.
(4) Fifty-eight million four hundred twenty- three thousand two hundred two.
(5) Twenty-three lakh thirty thousand ten.
Solution-
(1) 73,75,307
(2) 9,05,00,041
(3) 7,52,21,302
(4) 5,84,23,202
(5) 23,30,010
Ex 1.1 Question 3.
Insert commas suitably and write the names according to Indian System of Numeration:
(1) 87595762
(2) 8546283
(3) 99900046
(4) 98432701
Solution-
(1) 8,75,95,762 (Eight crores seventy-five lakh ninety-five thousand seven hundred sixty- two)
(2) 85,46,283 (Eighty-five lakh forty-six thousand two hundred eighty-three)
(3) 9,99,00,046 (Nine crore ninety-nine lakh forty-six)
(4) 9,84,32,701 (Nine crores eighty-four lakh thirty-two thousand seven hundred one)
Ex 1.1 Question 4.
Insert commas suitably and write the names according to International System of Numeration:
(1) 78921092
(2) 7452283
(3) 99985102
(4) 48049831
Solution-
(1) 78,921,092 (Seventy-eight million nine hundred twenty-one thousand ninety-two)
(2) 7,452,283 (Seven million four hundred fifty- two thousand two hundred eighty-three)
(3) 99,985,102 (Ninety-nine million nine hundred eighty-five thousand one hundred two)
(4) 48,049,831 (Forty-eight million forty-nine thousand eight hundred thirty-one)