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Big Ideas Math: Modeling Real Life, Grade 6

BI

Big Ideas Math: Modeling Real Life, Grade 6 View details

5. Multiplying Decimals

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Exercise 58 Page 79

Simplify the expression using the Associative Property of Multiplication.

137

Practice makes perfect

We are asked to evaluate the following expression. 6.85* 2 * 10 We will try to simplify this using the Associative Property of Multiplication.

6.85* 2 * 10

AssociativePropMult

Associative Property of Multiplication

6.85* (2* 10)

Multiply

6.85* 20

Now to find the product, we multiply just as we do with two whole numbers. At first, we ignore any decimal points.

Applet to multiply two natural numbers

Then we place the decimal point in the product by counting the number of decimal places in each factor.

multiplication

We found that the expression is equal to 137.00, or just 137.

Subchapter links

Try It p.74-76

Self-Assessment for Concepts & Skills p.76

Self-Assessment for Problem Solving p.77

Review & Refresh p.78

Concepts, Skills, & Problem Solving p.78-80