Verify each of the following:

(i) (ii)

(iii)

(iv)

(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?

Find each of the following products:

(i) (ii) (iii)

(iv) (v) (vi)

(vii) (viii) (ix)

(x) (xi)

(xii)

Verify each of the following:

(i)

(ii) �

(iii)

Fill in the blanks:

(i)

(ii)

(iii)

(iv)