RD Sharma Solutions for Class 9 Chapter 1 Number System Exercise 1.2

Chapter 1 Number System RD Sharma Solutions Exercise 1.2 Class 9 Maths

Chapter Name	RD Sharma Chapter 1 Number System Exercise 1.2
Book Name	RD Sharma Mathematics for Class 10
Other Exercises	Exercise 1.1 Exercise 1.3 Exercise 1.4 Exercise 1.5 Exercise 1.6
Related Study	NCERT Solutions for Class 10 Maths

Exercise 1.2 Solutions

Express the following rational numbers as decimals : 

1. (i) 42/100 
(ii) 327/500
(iii) 15/4 

Solution

2. (i) 2/3 
(ii) -4/9 
(iii) -2/15 
(iv) -22/13 
(v) 437/999

Solution

3. Look at several examples of rational numbers in the form p/q (q ≠ 0), where p and q are integers with no common factors other than 1 and having terminating decimal representations. Can you guess what property q must satisfy ? 

Solution

A rational number p/q is a terminating decimal only, when prime factors of q are q and 5 only. Therefore, p/q is a terminating decimal only, when prime factorization of q must have only powers of 2 or 5 or both.