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Big Ideas Math: Modeling Real Life, Grade 7
BI
Big Ideas Math: Modeling Real Life, Grade 7 View details
3. Converting Between Fractions and Decimals
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Exercise 8 Page 65

Multiply as though they were both whole numbers. Place the decimal point in the product by counting the number of decimal places in each factor.

0.0030018

Practice makes perfect

Before we find the exact product, we can estimate the multiplication by rounding the decimal numbers. We will round 1.0006 to 1 and 0.003 to 0 because these are the closest whole numbers. 1 * 0 = 0The product of 1.0006 and 0.003 is about 0. To find the product, we multiply just as we do with two whole numbers. At first, we ignore any decimal points. We should also make sure that the partial products are aligned in the correct place values.

$10006 \times 3 = 30018$

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

placing the decimal point

The product of 1.0006 and 0.003 is 0.0030018. This is pretty close to our estimate of 0!

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Try It 2 (Page 62)
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arrow_right Self-Assessment for Concept & Skills p.63
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arrow_right Self-Assessment for Problem Solving p.64
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arrow_right Review & Refresh p.65
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