Class 8 Exam > Class 8 Notes > RD Sharma Solutions for Class 8 Mathematics > RD Sharma Solutions (Ex.1.4): Rational Numbers
RD Sharma Solutions (Ex.1.4): Rational Numbers | RD Sharma Solutions for Class 8 Mathematics PDF Download
Question 1: Simplify each of the following and write as a rational number of the form p/q:
Answer :
(i)
=17/24
(ii)
= -17/18
(iii)
= -119/24
(iv)
= -61/31
(v)
= -5/60
= -1/12
(vi)
= 5/6
Question 2: Express each of the following as a rational number of the form p/q:
Answer :
(i)
= -177/24
= -59/8
(ii)
= 17/63
(iii)
= 235/24
(iv)
= -121/140
(v)
= 7/12
Question 3: Simplify:
Answer :
(i) 
Taking the L.C.M.of the denominators:
= -8/4
= -2
(ii) 
Taking the L.C.M.of the denominators:
= -1/6
(iii) 
Taking the L.C.M.of the denominators:
= 9/12
= 3/4
(iv) 
Taking the L.C.M.of the denominators:
= 33/70
(v) 
Taking the L.C.M.of the denominators:
= 17/30
(vi) 
Taking the L.C.M.of the denominators:
= 33/72
= 11/24
The document RD Sharma Solutions (Ex.1.4): 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.1.4): 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 or ratio of two integers. They can be positive or negative, and include numbers such as 1/2, -3/4, and 5/1.
| 2. How do you add rational numbers? | |
Ans. To add rational numbers, we need to find a common denominator for the fractions. Once we have a common denominator, we add the numerators and keep the denominator the same. We simplify the fraction if possible.
| 3. How do you subtract rational numbers? | |
Ans. To subtract rational numbers, we follow a similar process as addition. We find a common denominator for the fractions, subtract the numerators, and keep the denominator the same. We simplify the fraction if possible.
| 4. Can rational numbers be negative? | |
Ans. Yes, rational numbers can be negative. A rational number can be written in the form a/b, where a and b are integers and b is not equal to zero. The sign of a rational number is determined by the sign of the numerator.
| 5. How do you compare rational numbers? | |
Ans. To compare rational numbers, we can convert them to a common denominator and then compare the numerators. If the numerators are the same, we compare the denominators. The rational number with the greater numerator or smaller denominator is considered greater.
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