Lattice Multiplication

1
Lattice Multiplication

• Step-by-Step

2
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I dont remember how to multiply!!!
3
I can help!! Let me show you how to do Lattice
Multiplication.
HELP!!!
4
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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
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
6
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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
7
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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
8
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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
9
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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
10
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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
11
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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
12
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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
13
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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
14
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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
15
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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
16
That is Soooo Cool!!! Thanks!
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