Mastering Decimal Multiplication Techniques

The video tutorial covers the multiplication of decimal numbers, starting with an introduction to decimal numbers and figures. It explains the basic steps of multiplying decimals, including how to adjust decimal places in the result. The tutorial then demonstrates the standard algorithm for decimal multiplication and addresses special cases, such as results ending in zero. The video concludes with tips and encouragement for further practice.

What is a 'decimal number'?

• A number with a decimal point and figures after it

• A whole number

• A fraction

• A negative number

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CCSS.5.NBT.A.1

How many decimal figures does the number 3.14 have?

• 1

• 2

• 4

• 3

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CCSS.5.NBT.A.3A

What is the first step in multiplying decimal numbers?

• Divide the significant figures

• Subtract the decimal points

• Multiply the significant figures

• Add the decimal points

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CCSS.5.NBT.B.7

If you have 2 decimal figures in the original numbers, how many should be in the answer?

• 4

• 3

• 2

• 1

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CCSS.5.NBT.B.7

In the standard algorithm, what do you do with the decimal point initially?

• Add it to the result

• Move it to the left

• Move it to the right

• Ignore it

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CCSS.6.NS.B.3

When multiplying by one TEN, what should the second row start with?

• One

• Zero

• Two

• Three

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CCSS.4.NBT.B.5

What should you do if the multiplication result ends in a zero?

• Ignore the zero

• Remove the zero

• Add another zero

• Move the decimal point

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CCSS.5.NBT.B.7

How many decimal figures should be in the answer if the original numbers have 3 decimal figures?

• 2

• 4

• 3

• 1

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CCSS.5.NBT.B.7

What can you do with place-holding zeros before multiplication?

• Eliminate them

• Ignore them

• Move them

• Add them

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CCSS.5.NBT.B.5

What is the final step after placing the decimal point in the right place?

• Add more zeros

• Check the number of decimal figures

• Divide the result

• Multiply again

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CCSS.5.NBT.B.7