Multiplying Decimals with Models

The video tutorial explains how to multiply decimals using visual models. It begins by representing decimals as parts of a whole and demonstrates a multiplication example of 4/10 by 3/10 using overlapping models. The tutorial highlights that the multiplication facts remain the same as whole numbers, but the decimal point is used to express the answer. It also explains how the number of decimal places in the product is determined by the total decimal places in the factors.

How can decimals be visually represented?

• Through verbal descriptions

• With equations only

• Using pictures

• By using whole numbers

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CCSS.6.NS.C.6C

What does one unit represent in decimal pictures?

• A whole number

• A fraction

• A decimal point

• A percentage

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CCSS.8.NS.A.2

What does the whole number one unit represent in decimal pictures?

• A percentage of the value

• The entirety of the value

• A fraction of the value

• A decimal portion

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CCSS.4.NF.C.6

How do you multiply 4/10 by 3/10 using models?

• Subtract one model from the other

• Add the models together

• Overlay one model on the other

• Divide one model by the other

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

What does the overlapping of models represent in decimal multiplication?

• The quotient of the two decimals

• The difference between the two decimals

• The sum of the two decimals

• The product of the multiplication

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CCSS.5.NBT.B.7

What is the product of 4/10 multiplied by 3/10?

• 12 hundredths

• 7 tenths

• 12 tenths

• 7 hundredths

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CCSS.5.NF.B.6

What stays the same in decimal multiplication as in whole number multiplication?

• The multiplication facts

• The need for a decimal point

• The division facts

• The subtraction facts

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CCSS.5.NBT.B.7

How do you determine the number of decimal places in the product?

• Divide the decimal places of the factors

• Multiply the decimal places of the factors

• Add the decimal places of the factors

• Subtract the decimal places of the factors

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CCSS.5.NBT.B.7

How many decimal places are in the product of two factors, each with one decimal place?

• Two

• One

• Three

• Four

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CCSS.5.NBT.B.7