Selina Concise Class 6 Math Chapter 5 Natural Numbers and Whole Numbers Exercise 5(D) Solution
(1) Show that:
(i) division of whole numbers is not closed.
Solution: 5 / 8 is not a whole number, 5 / 0 is not possible, etc.
(ii) any whole number divided by 1, always gives the number itself
Solution: 18 / 1 = 18, 7 / 1 = 7 etc.
(iii) every non-zero whole number divided by itself gives 1 (one)
Solution: 7 / 7 = 1, 6 / 6 = 1
(iv) zero divided by any non-zero number is zero only
Solution: 0 / 12 = 0, 0 / 13 = 0 etc.
(v) a whole number divided by 0 is not defined
6 /0 is not defined 5 /0 is not defined.
(2) If x is a whole number such that x / x = x, state the value of x.
Ans. X =1
(3) Fill in the blanks:
(i) 987 / 1 = 987
(ii) 0 / 987 = 0
(iii) 336 – (888 / 888) = 336 – 1 = 335
(iv) (23 / 23) – (437 / 437) = 1 – 1 = 0
(4) Which of the following statements are true ?