Mastering Decimal Multiplication Techniques

This video tutorial covers the process of multiplying decimals, focusing on determining the sign of the result based on the signs of the numbers being multiplied. It provides four detailed examples, each illustrating different scenarios: multiplying two negative decimals, multiplying decimals with different signs, a complex multiplication with multiple decimal places, and multiplying two positive decimals. The video concludes with independent practice problems for viewers to solve on their own.

What is the result of multiplying two numbers with different signs?

• Cannot be determined

• Zero

• Negative

• Positive

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CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

If both numbers being multiplied are negative, what will be the sign of the result?

• Positive

• Negative

• Zero

• The sign varies

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CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

How many decimal places are there in the product of 4.12 and 0.16?

• One

• Three

• Two

• Four

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CCSS.6.NS.B.3

What is the correct placement of the decimal point in the product of 882 and 31 when both are considered as decimals with three places behind the point?

• 273.42

• 2.7342

• 27.342

• 0.27342

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CCSS.6.NS.B.3

What is the result of multiplying 12.541 and 0.321 considering the correct number of decimal places?

• 4.021621

• 40.21621

• 3.521621

• 0.4021621

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CCSS.6.NS.B.3

When multiplying two positive numbers, what will be the sign of the result?

• Zero

• The sign varies

• Negative

• Positive

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CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

How many decimal places should be in the product of 398 and 7.1?

• None

• One

• Three

• Two

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CCSS.5.NBT.B.7

What is the final result of multiplying 1.312 by 0.42 with correct decimal placement?

• 55.104

• 0.055104

• 5.5104

• 0.55104

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CCSS.6.NS.B.3

If you multiply 203 by 1.35, where should the decimal point be placed in the result?

• 2.7405

• 274.05

• 0.27405

• 27.405

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CCSS.6.NS.B.3

What is the correct result of multiplying 6.921 by 0.346 with the decimal placed accurately?

• 2.394666

• 23.94666

• 239.4666

• 0.2394666

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CCSS.6.NS.B.3