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Exercises Numbers, fractions and percents

Example 3.3 from Prealgebra, 3.1 Introduction to Integers

Introduction to Integers: example 3.3

Find the opposite of each number:

ⓐ $7$
ⓑ $−10$

Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.

1
Solution
1. ⓐ The number $−7$ is the same distance from $0$ as $7,$ but on the opposite side of $0 .$ So $−7$ is the opposite of $7$ as shown in Figure 3.14.
  
  Figure 3.14
2. ⓑ The number $10$ is the same distance from $0$ as $−10$ , but on the opposite side of $0 .$ So $10$ is the opposite of $−10$ as shown in Figure 3.15.
  
  Figure 3.15

Your turn

The book's Try It right after this example: same idea, new numbers. Only the answer is given.

Find the opposite of each number:

ⓐ $4$
ⓑ $−3$

How did it go?

PreviousIntroduction to Integers: example 3.2 Next Introduction to Integers: example 3.4

From Prealgebra (1st edition) by OpenStax (Rice University), section 3.1, licensed under CC BY 4.0. Original at openstax.org. We split the solution into steps; the words, numbers and figures are the book's. OpenStax doesn't endorse this site.