In each of the following, state whether the statements are true (T) or false (F).

For any rational number x, x + (–1) = –x.

In each of the following, state whether the statements are true (T) or false (F).

1 is the only number which is its own reciprocal.

In each of the following, state whether the statements are true (T) or false (F).

–1 is not the reciprocal of any rational number.

In each of the following, state whether the statements are true (T) or false (F).

For rational numbers x and y, if x < y then x – y is a positive rational number.

In each of the following, state whether the statements are true (T) or false (F).

If x and y are negative rational numbers, then so is x + y.