Understanding Decimal Multiplication

This video tutorial explains how to multiply decimals using different approaches, including converting decimals to fractions and using alternative methods. It provides examples, such as multiplying 8 by 0.7 and 3 by 0.87, and demonstrates how to convert results into decimal form. The video emphasizes the importance of estimating to verify the reasonableness of answers.

What is the first step in multiplying 8 by 7 tenths?

• Convert 7 tenths to a fraction

• Add 8 and 7 tenths

• Subtract 7 tenths from 8

• Convert 8 to a fraction

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CCSS.5.NBT.A.3A

How can 56 tenths be expressed as a decimal?

• 5.6

• 0.56

• 56.0

• 560

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CCSS.6.NS.B.3

What is the product of 8 and 7 tenths?

• 7.8

• 5.6

• 8.7

• 6.5

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CCSS.5.NBT.B.7

What is the first step in calculating 3 times 0.87?

• Add 3 and 0.87

• Convert 0.87 to a fraction

• Convert 3 to a fraction

• Subtract 0.87 from 3

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CCSS.5.NBT.B.7

What is the result of multiplying 3 by 87 hundredths?

• 261 hundredths

• 87 hundredths

• 3 hundredths

• 870 hundredths

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CCSS.5.NBT.A.3A

How is 261 hundredths expressed as a decimal?

• 261.0

• 0.261

• 26.1

• 2.61

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CCSS.5.NBT.B.7

What is the importance of estimation in decimal multiplication?

• To ensure the result is reasonable

• To make the calculation faster

• To simplify the numbers

• To avoid using fractions

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CCSS.5.NBT.B.7

What should you expect when multiplying a number by a decimal less than 1?

• A product less than the original number

• A product greater than the original number

• A product equal to the original number

• A product of zero

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CCSS.6.NS.B.3

What is the decimal representation of 3 times 0.87?

• 8.7

• 2.61

• 3.87

• 0.387

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CCSS.7.EE.B.3

Why is it important to verify the result of a decimal multiplication?

• To ensure it aligns with the expected range

• To make the process longer

• To avoid using a calculator

• To practice more calculations

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CCSS.7.EE.B.3