Class 9 Exam > Class 9 Notes > RD Sharma Solutions for Class 9 Mathematics > RD Sharma Solutions Ex-1.2, Number System, Class 9, Maths
RD Sharma Solutions Ex-1.2, Number System, Class 9, Maths | RD Sharma Solutions for Class 9 Mathematics PDF Download
Q1. Express the following rational numbers as decimals:
(i) 42/100
(ii) 327/500
(iii) 15/4
Solution:
(i) By long division method
100) 
( 0.42
400
200
Therefore, 42/100 = 0.42
(ii) By long division method
3000
2500
2000
Therefore, 327/500 = 0.654
(iii) By long division method
12
28
20
Therefore, 15/4 = 3.75
Q2. Express the following rational numbers as decimals:
(i) 2/3
(ii) 
(v) 437/999
Solution:
(i) By long division method
18
18
Therefore, 2/3 = 0.66
(ii) By long division method
3600
3600
3600
Therefore, 
– 0.444
(iii) By long division method
15
45
45
45
Therefore, 2/15 = -1.333
(iv) By long division method
13
78
117
26
39
91
78
117
Therefore, 
= – 1.69230769
(v) By long division method
3996
2997
6993
3996
2997
Therefore, 437/999 = 0.43743
Q3. Look at several examples of rational numbers in the form of p/q (q ≠ 0), where p and q are integers with no common factor 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.
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FAQs on RD Sharma Solutions Ex-1.2, Number System, Class 9, Maths - RD Sharma Solutions for Class 9 Mathematics
| 1. What are RD Sharma Solutions? |  |
Ans. RD Sharma Solutions are comprehensive solutions to the math textbook authored by R.D. Sharma. These solutions provide step-by-step explanations and solutions to the questions and exercises in the textbook, helping students understand and solve math problems effectively.
| 2. What is Ex-1.2 in RD Sharma Solutions for Class 9? | |
Ans. Ex-1.2 in RD Sharma Solutions for Class 9 refers to Exercise 1.2 in the textbook. This exercise is part of the Number System chapter and covers various topics related to number systems such as integers, rational numbers, irrational numbers, etc. The solutions provided for Ex-1.2 help students practice and understand these concepts better.
| 3. How can RD Sharma Solutions for Class 9 be beneficial for exam preparation? | |
Ans. RD Sharma Solutions for Class 9 are highly beneficial for exam preparation as they provide detailed explanations and step-by-step solutions for each question in the textbook. By practicing these solutions, students can improve their problem-solving skills, understand the concepts better, and gain confidence for the exams.
| 4. Are RD Sharma Solutions for Class 9 available in the same language as the article title? | |
Ans. Yes, RD Sharma Solutions for Class 9 are available in the same language as the article title. These solutions are designed to cater to students studying in schools where the medium of instruction is the same language as mentioned in the article title. This ensures that students can easily understand and grasp the concepts explained in the solutions.
| 5. Can the RD Sharma Solutions for Class 9 help in improving overall math skills? | |
Ans. Yes, RD Sharma Solutions for Class 9 can definitely help in improving overall math skills. The solutions provided in these books not only focus on solving the textbook questions but also provide additional practice exercises and problem-solving techniques. By consistently practicing these solutions, students can enhance their mathematical reasoning, logical thinking, and problem-solving abilities, which are essential for excelling in mathematics.
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