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Exercises Numbers, fractions and percents

Example 1.56 from Elementary Algebra, 1.4 Multiply and Divide Integers

Multiply and Divide Integers: example 1.56

Evaluate $20 - z$ when ⓐ $z = 12$ and ⓑ $z = −12 .$

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
ⓐ

Subtract. 8

ⓑ

Subtract. 32

Your turn

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

Evaluate: $17 - k$ when ⓐ $k = 19$ and ⓑ $k = −19 .$

How did it go?

PreviousMultiply and Divide Integers: example 1.48 Next Multiply and Divide Integers: example 1.62

From Elementary Algebra (1st edition) by OpenStax (Rice University), section 1.4, 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.