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Glencoe Math: Course 2, Volume 2

GM

Glencoe Math: Course 2, Volume 2 View details

3. Solve Equations with Rational Coefficients

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Exercise 27 Page 464

First, perform multiplication. Then, subtraction.

50

Practice makes perfect

According to the order of operations, expressions inside parentheses are evaluated first, followed by exponents, then multiplication and division, and finally addition and subtraction are evaluated last. We can use the acronym PEMDAS to help us remember the correct order!

pemdas

For the given expression, this means multiplication should be perform before the subtraction. Let's do it!

Operation	Before Simplification	After Simplification
Multiply	70 - 5* 4	70 - 20
Subtract terms	70 - 20	50

The expression is equal to 50.

Subchapter links

Guided Practice p.460

Independent Practice p.461-462

H.O.T. Problems p.462

Standardized Test Practice p.462-464

Extra Practice p.463

Common Core Review p.464