Mastering 3 Digit by 2 Digit Multiplication

This video tutorial reviews various methods for performing three-digit by two-digit multiplication. It covers the traditional method, lattice method, rainbow method, and box method, providing step-by-step instructions for each. The video concludes with a note on the bow tie method, which is not suitable for three-digit by two-digit multiplication. Each method is demonstrated using the example of multiplying 147 by 22, resulting in the product 3234.

What is the first step in the traditional method for multiplying 147 by 22?

• Add the digits

• Carry over the 1

• Multiply 2 by 7

• Multiply 1 by 2

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CCSS.4.NBT.B.5

In the traditional method, what do you do after multiplying 2 by 7 and getting 14?

• Add 1 to the next product

• Multiply 2 by 4

• Carry over the 1

• Write down 14

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CCSS.5.NBT.B.5

What is the result of adding up the products in the traditional method for 147 times 22?

• 3243

• 3423

• 3234

• 3324

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CCSS.5.NBT.B.5

In the lattice method, what is the first step after drawing the lattice grid?

• Multiply 2 by 1

• Multiply 2 by 7

• Add the diagonals

• Multiply 2 by 4

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CCSS.4.NBT.B.5

How do you handle the digits in the lattice method after multiplying?

• Add them directly

• Write them in the boxes

• Carry over the digits

• Ignore the carry

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CCSS.4.NBT.B.5

What is the first step in the rainbow method for multiplying 147 by 22?

• Carry over the digits

• Add the products

• Multiply the first two digits

• Multiply the last two digits

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CCSS.4.NBT.B.5

In the rainbow method, what do you do after multiplying the first two digits?

• Put two blanks

• Multiply the last two digits

• Carry over the digits

• Add the products

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CCSS.4.NBT.B.5

What is the first step in the box method for multiplying 147 by 22?

• Multiply the digits

• Break up the numbers

• Add the products

• Draw the boxes

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CCSS.4.NBT.B.5

In the box method, what do you do after breaking up the numbers?

• Carry over the digits

• Draw the boxes

• Multiply the digits

• Add the products

Tags

CCSS.4.NBT.B.5

Which method is not suitable for three-digit by two-digit multiplication?

• Traditional method

• Lattice method

• Rainbow method

• Bow tie method

Tags

CCSS.5.NBT.B.5