Class9 mathematics
CBSE 9 th standard Mathematics Chapter 1 Number System Example 1 Are the following statements true or false? Give reasons for your answers Every whole number is a natural number. Every integer is a rational number Every rational number is an integer Solution: i. False, because zero is a whole number but not a natural number. ii. True. because every integer m can be expressed in the form m/1 and so it is a rational number. False because 3/5 is not integer. Example 2 Solution 1 Find five rational numbers between 1 and 2 Take 1 as r and 2 as s add r and s and divide the sum by 2 that is (r+s)/2 = (1+2)/2 Therefor 3/2 is a number between 1 and 2 Other four numbers are 5/4, 11/8,13/8 and 7/4 Solution 2 Find five rational numbers between 1 and 2 Convert 1 and 2 into fraction form 1/1 and 2/1 If they ask...