1.1: Properties of Real Numbers

Question 1

Opposite or Additive Inverse

Answer 1

Any number a is -a. The sum of opposites is 0.

Question 2

Reciprocal or Multiplicative Inverse

Answer 2

Any nonzero number a is 1/a. The product of reciprocals is 1.

Question 3

Absolute Value of a Real Number

Answer 3

Its distance from zero on the number line.