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.