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Lattice Multiplication

- Step-by-Step

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I dont remember how to multiply!!!

I can help!! Let me show you how to do Lattice

Multiplication.

HELP!!!

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Make a grid the exact size of your problem. A 2

digit number times a 3 digit number gets a 2 x 3

grid. Draw a diagonal line in each box.

5

3

6

2

5

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Multiply 6 2 and place the answer in the grid

where the lines meet.

5

3

6

1

2

2

5

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Multiply 5 2 and place the answer in the grid

where the lines meet.

5

3

6

1

1

2

0

2

5

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Multiply 3 2 and place the answer in the grid

where the lines meet. Use a zero as a place

holder.

5

3

6

1

1

0

2

0

2

6

5

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Multiply 6 5 and place the answer in the grid

where the lines meet.

5

3

6

1

1

0

2

0

2

6

3

5

0

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Multiply 5 5 and place the answer in the grid

where the lines meet.

5

3

6

1

1

0

2

0

2

6

3

2

5

0

5

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Multiply 3 5 and place the answer in the grid

where the lines meet.

5

3

6

1

1

0

2

0

2

6

3

2

1

5

0

5

5

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Now add the diagonals and place the answer below

the grid. Be sure to carry to the next diagonal

if you have a 2 digit answer.

5

3

6

1

1

0

2

0

2

6

3

2

1

5

0

5

5

0

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Now add the diagonals and place the answer below

the grid. Be sure to carry to the next diagonal

if you have a 2 digit answer.

5

3

6

1

1

0

1

2

0

2

6

3

2

1

5

0

5

5

0

0

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Now add the diagonals and place the answer below

the grid. Be sure to carry to the next diagonal

if you have a 2 digit answer.

5

3

6

1

1

0

1

2

0

2

6

3

2

1

5

0

5

5

0

9

0

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Now add the diagonals and place the answer below

the grid. Be sure to carry to the next diagonal

if you have a 2 digit answer.

5

3

6

1

1

0

1

2

0

2

6

3

2

1

5

0

5

5

8

0

9

0

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Now add the diagonals and place the answer below

the grid. Be sure to carry to the next diagonal

if you have a 2 digit answer.

5

3

6

1

1

0

1

2

0

2

6

3

2

1

5

0

5

5

8

0

9

0

That is Soooo Cool!!! Thanks!

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