Q12 of 51 Page 19

Verify that – (–x) = x for

x =

According to the question,

-(-x) = x


LHS:- -(-X) RHS:- X




(Since - - = + )


LHS = RHS


Hence verified


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11

Is subtraction associative in rational numbers? Explain with an example.

 12

Verify that – (–x) = x for

x =

13

Write-

(i) The set of numbers which do not have any additive identity


(ii) The rational number that does not have any reciprocal


(iii) The reciprocal of a negative rational number.

 1

Represent these numbers on the number line.

(i) 9/7 (ii) -7/5