RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 1. Rational Numbers

Subject: Maths - Class 8th

Q. No. 5 of Exercise 1.2

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5

Using commutativity and associativity of addition of rational numbers, express each of the following as a rational number:

(i)


(ii)


(iii)


(iv)

(i) Reaaranging and grouping the numbers in pairs in such a way that each group contains a pair of rational numbers with equal denominator

We have,


+ + +


- + - = +


= +


=


=


(ii) Reaaranging and grouping the numbers in pairs in such a way that each group contains a pair of rational numbers with equal denominator


We have,


+ + +


- + - = +


= +


= +


=


(iii) Reaaranging and grouping the numbers in pairs in such a way that each group contains a pair of rational numbers with equal denominator


We have,


+ + + +


+ + - - = + -


= + +


= + -


=


=


(iv) Reaaranging and grouping the numbers in pairs in such a way that each group contains a pair of rational numbers with equal denominator


We have,


+ 0 + + +


- + + + = + -


= + -


= -


=


= -


=


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