Area Model Decimal Multiplication

Multiplying Decimals with Models

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Look at the model here

Can you make sense of what's going on?

Multiple Choice

What is the equation for the decimal multiplication model?

• 25 x 8 =200
• 0.25 x 8 = 0.20
• 0.8 x 25 = 2.0
• 8 x 0.25 = 2.00

Multiple Choice

How many groups are in this model? 

• 1
• 2
• 3
• 4

Multiple Choice

Which equation matches the model?

• 2 x 0.3 = 0.6
• 3 x 0.2 = 0.6
• 2 x 3 = 0.6
• 3 x 2 = 6

Complete your answer on the supporting handout.

Complete your answer on the supporting handout.

Go to the next slide to see how it's done!

Complete your answer on the supporting handout.

Complete your answer on the supporting handout.

Multiple Choice

Place the Decimal point in the product
0.9 x 0.9

• 0.81
• 8.1
• 0.081
• 81

Multiple Choice

Which Equation matches the model? 

• .4 x .2 = 0.8
• 0.6 x 0.1 = 0.06
• 0.2 x 0.4 = 0.8
• 0.2 x 0.4 = 0.08

Multiple Choice

Which equation matches the model?

• 0.4 x 0.3 = 0.12
• 12 x 0.3 = 3.6
• 3 x 4 = 12
• 3 x .12 = 0.36

Multiple Choice

Which color represents the product for this model?

• blue
• white
• pink
• purple

Go to the next slide to see how it's done!

Complete your answer on the supporting handout.

Multiple Choice

What is the equation for this model?

• 0.12 x 5 = 0.60

• 12 x 5 = 60

• 0.12 x 0.5 =0.06

• 0.5 x 12 = 6

Multiple Choice

1.6  x  ___ = 0.48

• 1.3
• 0.3
• 1.16
• 0.6

Multiple Choice

What equation is represented by the model?

• 1.5 x 0.5 = 0.75

• 1.5 x 0.5 = 7.5

• 1.5 x 1.5 = 0.75

Think about the patterns you may see.

Open Ended

What patterns do you see in the equations?

Complete your answer on the supporting handout.

Open Ended

If you multiply two decimals less than 1, can you predict whether the product will be less than or greater than either of the factors? Provide an example problem to explain your answer.

Poll

How do confident do you feel about what we just learned?

• Super Confident

• Medium Confident

• Not Confident