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(i) Which rational number is its own add...

(i) Which rational number is its own additive inverse?
(ii) Is the difference of two rational numbers a rational number?
(iii) Is the addition commutative on rational numbers?
(iv) Is addition associative on rational numbers?
(v) Is subtraction commutative on rational numbers?
(vi) Is subtraction associative on rational numbers?
(vii) What is the negative of a negative rational number?

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The correct Answer is:
(i) 0 (ii) Yes (iii) Yes (iv) yes (v) No (vi) No (vii) The number itself
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