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# L a t t i c e M u l t i p l i c a t i o n - PowerPoint PPT Presentation

L a t t i c e M u l t i p l i c a t i o n. The coolest way to multiply ! By : Merilee Cox Grade: 4. Standard. M4N3. Students will solve problems involving multiplication of 2-3 digit numbers by 1 or 2 digit numbers. . Lattice Multiplication may give you a new way to get to same answer. .

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### Lattice Multiplication

The coolest way to multiply!

By: Merilee Cox

• M4N3. Students will solve problems involving multiplication of 2-3 digit numbers by 1 or 2 digit numbers.

Let’s try 4 x 3 ones:

3

4

1

2

So, 4 x 3 = 12

Let’s try 3 x 2 ones:

2

3

0

6

So, 3 x 2 = 6

I ones:

Let’s take another look!

1

4

5

6

5

0

0

2

0

0

6

2

4

Now, just add down the diagonal stripes...  Start at the bottom and work your way up the stripes:

I bottom and work your way up the stripes:

Here is another look!

1

4

5

6

5

0

0

2

0

0

6

2

4

0

8

4

7

So, 14 x 56 = 784

I bottom and work your way up the stripes:

Let’s Do Another One!

17 x 52

1

7

5

2

5

0

0

3

5

0

2

1

4

0

8

4

8

So, 17 x 52 = 884

2 bottom and work your way up the stripes:

0

1

We Can Also Do Three Digit by Two Digit 240 x 13

3

0

1

2

4

0

1

3

0

2

0

4

0

0

0

6

1

0

0

2

So, 240 x 13 = 3,120

So what do you think? bottom and work your way up the stripes: