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Big Ideas Math: Modeling Real Life, Grade 7
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Big Ideas Math: Modeling Real Life, Grade 7 View details
3. Converting Between Fractions and Decimals
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Exercise 5 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.

35.28

Practice makes perfect

Before we find the exact product, we can estimate the multiplication by rounding the decimal numbers. Only the first factor is a decimal. We will round 5.88 to 6 because it is the closest whole number. 6 * 6 = 36The product of 5.88 and 6 is about 36. 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.

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

multiplication

The product of 5.88 and 6 is 35.28. This is pretty close to our estimate of 36!

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arrow_right Self-Assessment for Problem Solving p.64
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