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Exercises Numbers, fractions and percents

Example 3.55 from Prealgebra, 3.4 Multiply and Divide Integers

Multiply and Divide Integers: example 3.55

$Simplify: −30 \div 2 + (−3) (−7) .$

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
First we will multiply and divide from left to right. Then we will add.

$−30 \div 2 + (−3) (−7)$

Divide. $−15 + (−3) (−7)$

Multiply. $−15 + 21$

Add. $6$

Your turn

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

Simplify:

$−27 \div 3 + (−5) (−6)$

How did it go?

PreviousMultiply and Divide Integers: example 3.54 Next Multiply and Divide Integers: example 3.57

From Prealgebra (1st edition) by OpenStax (Rice University), section 3.4, 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.