Mastering Double Digit Multiplication Techniques

This video tutorial explains the process of double digit multiplication through examples. It begins with a detailed walkthrough of multiplying 44 by 12, highlighting the importance of partial products and place value alignment. The instructor then demonstrates two more examples: 143 times 14 and 86 times 21, emphasizing the need to align numbers vertically for accuracy. The video concludes with a reminder to practice these techniques independently.

What is the first step in double digit multiplication?

• Subtract the multiplicand from the multiplier

• Add the multiplicand and the multiplier

• Multiply the multiplicand by the ones digit of the multiplier

• Multiply the multiplicand by the tens digit of the multiplier

Tags

CCSS.4.NBT.B.5

Why do we add a zero when multiplying by the tens place digit?

• To make the calculation easier

• To avoid mistakes

• Because it is a rule in multiplication

• Because the tens place digit represents ten

Tags

CCSS.4.NBT.B.5

What is the partial product of 44 multiplied by 2?

• 88

• 440

• 528

• 44

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CCSS.5.NBT.B.5

What is the final product of 44 times 12?

• 528

• 440

• 88

• 520

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CCSS.4.NBT.B.5

What is the first partial product when multiplying 143 by 4?

• 143

• 500

• 1430

• 572

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CCSS.3.OA.A.1

What is the second partial product when multiplying 143 by 10?

• 1430

• 572

• 143

• 14300

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CCSS.4.NBT.B.5

What is the final product of 143 times 14?

• 2014

• 2002

• 1430

• 572

Tags

CCSS.4.NBT.B.5

What is the first partial product when multiplying 86 by 1?

• 1720

• 172

• 86

• 860

Tags

CCSS.3.OA.A.1

What is the second partial product when multiplying 86 by 20?

• 1720

• 860

• 172

• 86

Tags

CCSS.4.NBT.B.5

What is the final product of 86 times 21?

• 86

• 1806

• 172

• 1720

Tags

CCSS.4.NBT.B.5