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Exercises Numbers, fractions and percents

Example 3.40 from Prealgebra, 3.3 Subtract Integers

Subtract Integers: example 3.40

Simplify: $3 \cdot 7 - 4 \cdot 7 - 5 \cdot 8 .$

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
We use the order of operations to simplify this expression. First we multiply, and then subtract from left to right.

Multiply first.

Subtract from left to right.

Subtract.

Your turn

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

Simplify the expression:

$6 \cdot 2 - 9 \cdot 1 - 8 \cdot 9 .$

How did it go?

PreviousSubtract Integers: example 3.39 Next Subtract Integers: example 3.41

From Prealgebra (1st edition) by OpenStax (Rice University), section 3.3, 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.