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Exercises Numbers, fractions and percents

Example 1.41 from Elementary Algebra, 1.3 Add and Subtract Integers

Add and Subtract Integers: example 1.41

Subtract: ⓐ $7 - 5$ ⓑ $−7 - (−5) .$

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.

Solution

ⓐ
Take 5 positive from 7 positives and get 2 positives. $\begin{matrix} 7 - 5 \\ 2 \end{matrix}$

ⓑ
Take 5 negatives from 7 negatives and get 2 negatives. $\begin{matrix} −7 - (−5) \\ −2 \end{matrix}$

Your turn

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

Subtract: ⓐ $6 - 4$ ⓑ $−6 - (−4) .$

How did it go?

PreviousAdd and Subtract Integers: example 1.39 Next Add and Subtract Integers: example 1.42

From Elementary Algebra (1st edition) by OpenStax (Rice University), section 1.3, 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.