Decimal Multiplication with Models

This video tutorial covers multiplying decimals using models. It begins with an introduction to multiplication terms and the learning target of finding products of whole numbers and decimals. The video demonstrates how to multiply whole numbers by decimals using repeated addition and models, and then explains multiplying decimals by decimals using a hundredths grid. The concept of 'part of a part' is illustrated with examples, and practice problems are provided to reinforce learning.

Which of the following words does NOT mean to multiply?

• Sum

• Groups of

• Times

• Product

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CCSS.3.OA.A.1

What does 2 times 32 hundredths represent?

• 32 groups of 2

• 2 groups of 32 hundredths

• 32 groups of 2 hundredths

• 2 groups of 32

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CCSS.5.NBT.A.2

How many hundredths are there in 2 times 32 hundredths?

• 3200

• 6400

• 64

• 32

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CCSS.4.NF.B.4B

CCSS.4.NF.B.4C

What does five tenths of three tenths equal?

• 15

• 150

• 1500

• 15 hundredths

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CCSS.5.NBT.B.7

Why does multiplying tenths by tenths result in hundredths?

• Because each tenth splits into 10 pieces

• Because tenths are larger than hundredths

• Because tenths and hundredths are the same

• Because tenths are smaller than hundredths

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CCSS.5.NBT.A.1

If you take half of a half, what fraction of the original do you have?

• 1/8

• 1/16

• 1/2

• 1/4

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CCSS.4.NF.B.4A

CCSS.4.NF.B.4B

In a hundreds grid, what does shading 7 tenths vertically and 9 tenths horizontally represent?

• 63 hundredths

• 79 hundredths

• 97 hundredths

• 16 hundredths

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CCSS.5.NBT.B.7

How many blocks are shaded when you multiply 7 tenths by 9 tenths?

• 70

• 63

• 49

• 56

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CCSS.5.NF.B.6

What is the product of 1.6 and 0.2 in hundredths?

• 4 hundredths

• 8 hundredths

• 16 hundredths

• 32 hundredths

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CCSS.6.NS.B.3

When shading grids for multiplication, what does the overlap represent?

• The product

• The sum

• The quotient

• The difference

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CCSS.3.OA.A.1