Expanded Algorithm for Multiplication

In this video, Coach Mike introduces the concept of the expanded algorithm for multiplication. He begins with a standard multiplication problem, 89 * 7, and explains the steps involved in solving it. He then introduces the expanded algorithm, which involves breaking down the multiplication into simpler parts without regrouping. The video provides a detailed walkthrough of the expanded algorithm, demonstrating how to multiply each digit separately and then combine the results. The lesson concludes with a challenge for students to apply what they've learned.

What is the main topic of today's lesson?

• Addition

• Division

• Subtraction

• Expanded Algorithm with Multiplication

What is the product of 89 and 7 in the standard multiplication example?

• 623

• 693

• 583

• 703

In the standard multiplication example, what is the result of multiplying 7 by 9?

• 72

• 81

• 63

• 56

What is the first step in the expanded algorithm?

• Add the results

• Multiply the tens place

• Regroup the numbers

• Draw a line between the digits

In the expanded algorithm, what is the value of 9 in the ones place?

• 9

• 90

• 900

• 0.9

When multiplying 7 by 80 in the expanded algorithm, what is the first step?

• Multiply 7 by 80 directly

• Add a zero to 7

• Multiply 7 by 8

• Subtract 7 from 80

What is the result of multiplying 80 by 7 using mental math?

• 560

• 580

• 600

• 620

What is the final step in the expanded algorithm?

• Subtract the results

• Divide the results

• Multiply the results

• Add the results together

What is the sum of 3 and 0 in the final addition step?

• 6

• 3

• 9

• 0

What is the sum of 6 and 6 in the final addition step?

• 11

• 13

• 10

• 12