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The orange dots mark seven integers on the number line. How many pairs of dots are additive inverses of each other (they add up to 0)?

Class 7Properties of IntegersIntegers

A3
B1
C2
D4

Step-by-Step Solution

The dots are at

- 6, - 4, - 1, 1, 3, 4, 7

. Pairs adding to 0:

(- 4, 4)

and

(- 1, 1)

. The others

(- 6

, 3, 7) have no partner, so there are 2 pairs.

Answer: C) 2

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