Chapter 1.5, Problem 22P

Writing Explain how you would use a number line to find $6+(-8)$.

To determine

The sum of the two numbers by using a number line of

Answer to Problem 22P

The sum of the two numbers is

  $6+(-8)=-2$

Explanation of Solution

Given:

The numbers are -8 and 6.

Calculation:

Numbers are added as follows:

  

First expression has positive direction and hence we move 6 from zero. Then we have positive direction but (negative movement of 8). Hence from 6, negative direction to 8. Finally we reached at -2.

Hence, by using a number line the sum of $6+(-8)$is

  $6+(-8)=-2$