Q13 of 118 Page 10

What number should be subtracted fromto get?

Let the number = x


Now,


According to question,







In lowest terms,



Therefore, should be subtracted from so as to get


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11

What number should be added toso as to get?

 12

What number should be added toso as to get?

 14

(i) Which rational number is its own additive inverse?

(ii) Is the difference of two rational numbers a rational number?


(iii) Is 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?

 1

Find each of the following products:

(i) (ii) (iii)


(iv) (v) (vi)


(vii) (viii) (ix)


(x) (xi)


(xii)