Pearson Algebra 1 Common Core, 2011
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Pearson Algebra 1 Common Core, 2011 View details
4. Properties of Real Numbers
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Exercise 49 Page 28

390

Practice makes perfect
Let's take a look at the given expression.

25* 3.9* 4 We are asked to simplify this expression. We can rearrange the factors using the Commutative Property of Multiplication to simplify the calculations.

Property/Operation Before After
Commutative Property of Multiplication 25 * 3.9 * 4 25 * 4 * 3.9
Associative Property of Multiplication 25 * 4 * 3.9 ( 25 * 4 ) * 3.9
Multiply ( 25 * 4) * 3.9 100 * 3.9
Multiply 100 * 3.9 390