Lattice Multiplication Techniques for Multi-Digit Problems

Mrs. MacPhail introduces lattice multiplication, a method for multiplying numbers using a grid. She explains how to set up the lattice, fill in the factors, and perform the multiplication. The video includes examples of multiplying 23 by 6, 80 by 4, and 377 by 8, demonstrating the process of drawing boxes, filling in numbers, and adding along diagonals to find the final product.

What is the first step in setting up a lattice multiplication grid?

• Adding the numbers

• Drawing the diagonals

• Writing the factors

• Drawing the boxes

How do you determine the number of boxes needed for the lattice grid?

• By the number of digits in both numbers

• By the sum of the digits in both numbers

• By the number of digits in the second number

• By the number of digits in the first number

Where do you place the tens digit when filling in the lattice grid?

• Below the diagonal

• Above the diagonal

• To the left of the diagonal

• To the right of the diagonal

What should you do after filling in all the boxes with the products?

• Draw more boxes

• Erase the factors

• Multiply again

• Add along the diagonals

In the example 23 times 6, what is the product of 3 times 6?

• 12

• 18

• 30

• 24

In the example 80 times 4, what is the product of 8 times 4?

• 36

• 32

• 28

• 24

What is the final answer for the multiplication of 80 times 4 using lattice method?

• 240

• 400

• 280

• 320

In the example 377 times 8, how many boxes are needed horizontally?

• 3

• 2

• 1

• 4

What is the product of 7 times 8 in the example 377 times 8?

• 48

• 54

• 64

• 56

What is the final answer for the multiplication of 377 times 8 using lattice method?

• 3016

• 3160

• 3060

• 3000