S Chand ICSE Mathematics Class 6 Solution First Chapter Numbers Exercise 1C (O.P. Malhotra, S.K. Gupta, Anubhuti Gangal)
Exercise 1 (C)
(1) Read and write down in words the following numbers in Indian system.
(i) 18,00,808
Ans:- Eighteen lakh eight hundred eight
(ii) 12,36,748
Ans:- Twelve lakh thirty-six thousand seven hundred forty-eight
(iii) 8,30,09,007
Ans:- Eight crore thirty lakh nine thousand seven
(iv) 10,00,30,004
Ans:- Ten crore thirty thousand four.
(2) Express in numerals.
(i) Six lakh three thousand seven hundred eighty-five
Ans:- 6,03,785
(ii) Eighty lakh fifteen thousand two hundred five.
Ans:- 80,15,205
(iii) Thirty crore seven lakh nine thousand four hundred two.
Ans:- 30,07,09,402
(iv) Eight crore five thousand six.
Ans:- 8,00,05,006
(v) Sixty-one crore twenty-five thousand four hundred six.
Ans:- 61,00,25,406
(3) State the place value of
(i) 8 in 287
Ans:- 80
(ii) 7 in 7002
Ans:- 7000
(iii) 0 on 7,08,23,431
Ans:- 0
(iv) 9 in 17,87,93,510
Ans:- 90,000
(v) 3 in 3,14,56,007
Ans:- 3,00,00,000
(4) Find the difference between the place values of
(i) 6 in 6,15,265
Ans:- 5,99,940
(ii) 3 in 3,47,13,671
Ans:- 2,99,97,000
(iii) 5 in 95,23,165
Ans:- 4,99,995
(iv) 4 in 8,36,45,241
Ans:- 39,960
(5) Express each of the following numbers in expanded form.
(i) 523
Ans:- 5 x 100 + 2 x 10 + 3 x 1
(ii) 6,348
Ans:- 6 x 1000 + 3 x 100 + 4 x 10 + 8 x 1
(iii) 9,50,842
Ans:- 9 x 100000 + 5 x 10000 + 8 x 100 + 4 x 10 + 2 x 1
(iv) 8,26,05,943
Ans:-8 x 10000000 + 2 x 1000000 + 6 x 100000 + 5 x 1000 + 9 x 100 + 4 x 10 + 3 x 1
(6) Write the numbers whose expanded forms are given below.
(i) (5 x 10000) + (7 x 1000) + (8 x 100) + (1 x 10) + (6 x 1)
Ans:- 57,876
(ii) (7 x 100000) + 99 x 10000) + (0 x 1000) + (6 x 100) + (2 x 10) + (8 x 1)
Ans:- 7,90,628
(iii) 60,00,000 + 40, 000 + 2000 + 100 + 7
Ans:- 60,42,107
(7) Compare each of the following pairs by putting <,> in the box.
(i) 16,23,168 ___ 6,63,516
Ans:- >
(ii) 16,43,17,345 ___ 16,43,17,453
Ans:- <
(iii) 30,17,894 ___ 4,29,17,894
Ans:- <
(iv) 86,60,000 ___ 86,59,999
Ans:- >
(8) Rearrange the numbers in each part the largest to the smallest.
(i) 17,800 ; 17,903 ; 17, 308 ; 17,400
Ans:- 17,903 ; 17,800 ; 17, 400 ; 17,308
(ii) 5,90,672 ; 5,09,762 ; 7,95,072 ; 9,07,652
Ans:- 9,07,652 ; 7,95,072 ; 5,90,672 ; 5,09,762
(iii) 60,09,320 ; 9,00,00,013 ; 89,79,561 ; 9,00,00,031
Ans:- 9,00,00031 ; 9,00,00,013 ; 89,79,561 ; 60,09,320
Multiple Choice Question (MCQ)
(9) The number, whose expanded form is 60,00,000 + 40,000 + 2000 + 100 + 7 in words is
(a) Six lakh forty-two thousand one hundred seven.
(b) Sixty lakh forty-two thousand one hundred seven.
(c) Sixty-four lakh two thousand one hundred seven.
(d) Sixty lakh-two thousand one hundred seven.
Ans:- (d) Sixty lakh-two thousand one hundred seven.
Challenges!
(10) (i) Write the smallest 8-digit odd number using all odd digits.
Ans:- 11113579
(ii) Write the above number in words in Indian system
Ans:- One crore eleven lakh thirteen thousand five hundred seventy-nine.
(iii) Write the successor of this number in the expanded form.
Ans:- 1,11,13,580=1,00,00,000 + 10,00,000 + 1,00,000 + 10,000 + 3000 + 500 + 80