Lattice Method

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Lattice Method : 

Lattice Method

When you see… : 

When you see… 28 X74

Do you think… : 

Do you think… I don’t get it! This is hard! Uh-oh!

Then, try this! : 

Then, try this!

You have an equation to solve. : 

You have an equation to solve. 28 X 74 =

28 X 74 = : 

28 X 74 = Draw a box Split it into fourths. Draw diagonals.

Write the factors on the top & right sides of the box. : 

Write the factors on the top & right sides of the box. 7 4 2 8

Multiply to complete the top row. : 

Multiply to complete the top row. 7 X 8 = 56 2 8 7 4 7 X 2 = 14 5 6 1 4

Multiply to complete the bottom row. : 

Multiply to complete the bottom row. 4 X 8 = 32 2 8 7 4 3 2 0 8 4 X 2 = 8

Add the diagonals. : 

Add the diagonals. 2 8 7 4 2 0 7 2 1 1

Your product (answer) is the numbers on the bottom & left sides. : 

Your product (answer) is the numbers on the bottom & left sides. 2 8 7 4 2 0 7 2

28 X 74 = 2,072 : 

28 X 74 = 2,072

Slide 13: 

Now I get it!

Now you try one! : 

Now you try one! 3 9 7 3

Did you get it? : 

Did you get it?

Slide 16: 

3 9 7 3 7 4 8 2 And the answer is…

Way to go! : 

Way to go!