S Chand ICSE Mathematics Class 6 Solution First Chapter Numbers Exercise 1D (O.P. Malhotra, S.K. Gupta, Anubhuti Gangal)
Exercise 1 (D)
(1) Read the following numbers in the International system and write in words.
(i) 43,671
Ans:-Forty-three thousand, six hundred seventy-one
(ii) 230,056
Ans:- Two hundred thirty thousand, fifty-six
(iii) 68,823,761
Ans:- Sixty-eight million, eight hundred twenty-three thousand, seven hundred sixty-one
(iv) 500,002
Ans:- Five hundred thousand, two
(v) 1,369,864,002
Ans:- One billion, three hundred sixty-nine million, eight hundred sixty-four thousand, two
(vi) 70,112,005,458
Ans:- Seventy billion, one hundred twelve million, five thousand, four hundred fifty-eight
(2) Write the following numerals for each of the following numbers.
(i) Four hundred six thousand seven hundred twelve.
Ans:- 406,712
(ii) Seven million eight hundred thirteen thousand three hundred.
Ans:- 7,813,300
(iii) Five hundred nine million eight thousands, seven.
Ans:- 509,008,007
(iv) Two billion eighteen million nine hundred one thousand seventeen.
Ans:-2,018,901,017
(v) Eighteen billion five hundred nineteen million nine hundred thirteen thousand seven hundred two.
Ans:-18,519,913,702
(vi) Thirty-nine billion five hundred thousand forty-eight.
Ans:- 39,000,500,048
(3) Write the compact numeral for 8000000 + 50000 + 90 + 9 using International system of numeration. Also, write the number name.
Ans:- 8,050,099; Eight million fifty thousand ninety-nine.
(4) Match the contents of column A with those of column B.
Column A | Column B |
(i) Two hundred thousand
(ii) Two billion (iii) Twenty million (iv) Two million |
(a) Two crore
(b) Twenty lakh (c) Two hundred crore (d) Two lakh |
Ans:- (i) __(d), (ii) ___ (c), (iii) ___ (a), (iv) ___ (b)
(5) Write down three consecutive whole numbers just preceding 729,001.
Ans:- 728,998; 728,999; 729,000
(6) Write in numerals and words the largest 8-digit numbers having four different digits in
(i) Indian system of numeration
Ans:- 9,99,99,876; Nine crore ninety-nine lakh ninety-nine thousand eight hundred seventy-six.
(ii) International system of numeration
Ans:- 99,999,876; Ninety-nine million nine hundred ninety-nine thousand eight hundred seventy-six.
Multiple Choice Questions (MCQs)
(7) The smallest 8-digit number using three different digits can be read as
(a) Ten million two
(b) One million two
(c) One hundred million two
(d) One hundred thousand two
Ans:- (a) Ten million two
(8) The number 999,999,998 can be read in the Indian system as:
(a) Nine hundred ninety-nine crore nine hundred ninety-nine thousand nine hundred ninety-eighty.
(b) Ninety-nine crore nine lakh ninety-nine thousand nine hundred ninety-eighty.
(c) Nine crore ninety-nine lakh ninety-nine thousand nine hundred ninety-eight.
(d) Ninety-nine crore ninety-nine lakh ninety-nine thousand nine hundred ninety-eight.
Ans:- (d) Ninety-nine crore ninety-nine lakh ninety-nine thousand nine hundred ninety-eight.