Understanding Array Multiplication Method

The video tutorial explains a method for multiplying two-digit numbers using an algorithm that involves partial products and arrays. The instructor demonstrates the process with the example of 12 x 13, showing how to align and label the array, calculate partial products, and perform step-by-step multiplication. The method is compared to traditional techniques, highlighting its alignment with previous lessons on partial products and arrays. The tutorial concludes with the final calculation, resulting in the product of 156.

What is the main advantage of using an algorithm for multiplication?

• It is faster than traditional methods.

• It simplifies the setup of the problem.

• It requires no understanding of numbers.

• It is the only method taught in schools.

How does the algorithm relate to the way parents learned multiplication?

• It is more complex than the traditional method.

• It is closer to the traditional method.

• It is a modern version of the same method.

• It is completely different.

What is the purpose of using arrays in this multiplication method?

• To help visualize partial products.

• To make the process slower.

• To make the problem look more complex.

• To avoid using numbers altogether.

Why is the multiplication problem flipped on its side?

• To confuse the students.

• To make it harder to solve.

• To better align with the method.

• To make it look different from traditional methods.

What does the green box represent in the array?

• 10 by 3

• 10 by 2

• 10 by 10

• 2 by 3

What does the purple box represent in the array?

• 10 by 10

• 2 by 3

• 10 by 3

• 10 by 2

What is the partial product of the 10 by 3 block?

• 100

• 20

• 6

• 30

What is the first step in the algorithm?

• Multiply 10 by 10

• Multiply 3 by 2

• Multiply 2 by 3

• Multiply 1 by 2

What is the partial product of the 2 by 3 block?

• 30

• 100

• 20

• 6

What is the product of 2 times 3 in the array?

• 6

• 100

• 20

• 30