Class 8 Exam > Class 8 Notes > RD Sharma Solutions for Class 8 Mathematics > RD Sharma Solutions (Ex.1.3): Rational Numbers
RD Sharma Solutions (Ex.1.3): Rational Numbers | RD Sharma Solutions for Class 8 Mathematics PDF Download
Question 1: Subtract the first rational number from the second in each of the following:
Answer :
(i) 
(ii) 
(iii) 
(iv) 
(v) 
(vi) 
(vii) 
(viii) 
Question 2: Evaluate each of the following:
Answer :
(i) 
(ii) 
(iii) 
(iv) 
(v) 
(vi) 
(vii) 
(viii) 
(ix)
(x) 
(xi) 
Question 3: The sum of the two numbers is 5/9.59. If one of the numbers is 1/3,13, find the other.
Answer :
It is given that the sum of two numbers is 5/9, where one of the numbers is 13.Let the other number be x.
Question 4: The sum of two numbers is -1/3.-13. If one of the numbers is -12/3,-123, find the other.
Answer : It is given that the sum of two numbers is-1/3, where one of the numbers is −12/3.Let the other number be x.
Question 5: The sum of two numbers is -4/3.-43. If one of the numbers is −5, find the other.
Answer :
It is given that the sum of two numbers is −4/3, where one of the numbers is −5.Let the other number be x.
Question 6: The sum of two rational numbers is −8. If one of the numbers is -15/7,-157, find the other.
Answer :
It is given that the sum of two rational numbers is −8, where one of the numbers is −15/7.Let the other rational number be x.
Therefore,theotherrationalnumberis -41/7.
Question 7: What should be added to -7/8 so as to get 5/9?
Answer : Let x be added to -7/8 so as to get 5/9.
Question 8: What number should be added to -5/11-511 so as to get 26/33 ?
Answer : Let x be added.
Question 9: What number should be added to -5/7 to get -2/3?
Answer : Let x be added.
Question 10: What number should be subtracted from -5/3 to get 5/6?
Answer : Let x be subtracted.
Question 11:What number should be subtracted from 3/7 to get 5/4?
Answer : Let, x be subtracted.
Question 12: What should be added to (2/3+3/5) to get −2/15?
Answer : Let x be added.
Question 13: What should be added to (1/2+1/3+1/5) to get 3?
Answer : Let x be added.
Question 14:What should be subtracted from (3/4−2/3) to get −1/6?
Answer : Let x be subtracted.
Question 15: Fill in the blanks:
Answer :
(i) 
(ii)
(iii) 
(iv) 
The document RD Sharma Solutions (Ex.1.3): Rational Numbers | RD Sharma Solutions for Class 8 Mathematics is a part of the Class 8 Course RD Sharma Solutions for Class 8 Mathematics.
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FAQs on RD Sharma Solutions (Ex.1.3): Rational Numbers - RD Sharma Solutions for Class 8 Mathematics
| 1. What are rational numbers? |  |
Ans. Rational numbers are numbers that can be expressed as a fraction, where the numerator and denominator are both integers. They can be positive, negative, or zero.
| 2. How do you determine if a number is rational or not? | |
Ans. To determine if a number is rational, we need to check if it can be written as a fraction. If it can be expressed as a fraction, then it is rational. If not, then it is irrational.
| 3. Can all fractions be considered as rational numbers? | |
Ans. Yes, all fractions can be considered as rational numbers. A fraction is defined as the ratio of two integers, and rational numbers are numbers that can be expressed as fractions. Therefore, all fractions are rational numbers.
| 4. Are whole numbers and integers also rational numbers? | |
Ans. Yes, whole numbers and integers can also be considered as rational numbers. Whole numbers are a subset of integers, and integers are a subset of rational numbers. Therefore, whole numbers and integers are included in the set of rational numbers.
| 5. How can rational numbers be represented on a number line? | |
Ans. Rational numbers can be represented on a number line by placing them at their corresponding positions. For example, if a rational number is 1/2, it would be represented by placing a point halfway between 0 and 1 on the number line. Similarly, other rational numbers can be represented by locating their corresponding fractions on the number line.
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