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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 59 Page 79

Pay close attention to the order of operations.

4.355

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 evaluating the product first. 1.047* 5 -0.88 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 product is 5.235. 2.4* 16 -0.88= 5.235-0.88=4.355 The expression is equal to 4.355.

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