Question

class 9 cbsc
chapter 1 , Number systems...
please solve both the questions and give me answer ....please....​

Answer 1

Answer:

if the denominator be 2 or 5 or both then it must have terminating decimal

Answer 2

Answer:

To represent rational number p/q (q≠0) in terminating decimal form it is necessary to choose denominator q such that it's prime factorisation must has only powers of 2 or powers of 5

for example:

(1). 7/16 is a terminating decimal because 16=2⁴

(2). 11/25 is a terminating decimal because 25 =5²

I hope it doubt is clear