Mastering Double Digit Multiplication Techniques

Why is it important to know your multiplication tables before attempting double-digit multiplication?

• It helps in subtraction.

• It makes division easier.

• It helps in addition.

• It ensures accuracy in multiplication.

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CCSS.5.NBT.B.5

What is the first step in the Window Pane method?

• Subtract the smaller number from the larger one.

• Add the numbers together.

• Break the numbers into expanded form.

• Multiply the numbers directly.

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CCSS.6.NS.B.3

In the Window Pane method, what is the product of 3 * 30?

• 300

• 3

• 30

• 90

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CCSS.4.NBT.B.5

What is the final product of 34 * 23 using the Window Pane method?

• 812

• 720

• 728

• 782

Tags

CCSS.5.NBT.B.5

Why is the Butterfly method named so?

• Because it is colorful.

• Because the steps resemble butterfly wings.

• Because it involves drawing butterflies.

• Because it is easy to remember.

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CCSS.RI. 9-10.10

CCSS.RI.6.10

CCSS.RI.7.10

CCSS.RL.6.10

CCSS.RL.9-10.10

In the Butterfly method, what do you do after multiplying 3 * 4?

• Add the product to the next number.

• Carry over the product.

• Subtract the product from the next number.

• Write the product directly.

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CCSS.4.NBT.B.5

Why do we put a zero as a placeholder in the Butterfly method?

• To hold the place for the hundreds.

• To make the addition easier.

• To make the multiplication easier.

• To hold the place for the tens.

Tags

CCSS.5.NBT.B.5

What is the product of 20 * 4 in the Butterfly method?

• 800

• 8

• 40

• 80

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CCSS.4.NBT.B.5

What should you do if you get the same product using both the Window Pane and Butterfly methods?

• Recheck your calculations.

• Assume there is an error.

• Multiply the numbers again.

• Consider the product correct.

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CCSS.5.NBT.A.2

What is the final product of 34 * 23 using the Butterfly method?

• 812

• 728

• 720

• 782

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CCSS.5.NBT.B.7