How to Multiply using Lattice

1
How to Multiply using Lattice
2
Step 1 How many boxes to you need?

• 23
• X 5
• You need 2 boxes on top and 1 on the side.

3
Step 2 Set up the Lattice Box

• 2 3
• 5

4
Step 3 Multiply 2 by 5

• 2 3
• 5

1
0
5
Step 4 Multiply 3 by 5
2 3
5
1
1
0
5
6
Step 5 Add the numbers between the slanted lines
2 3
5
1
1
0
1
5
1
5
7
Step 6 Write your answer to the problem
2 3
5
1
1
0
1
5
1
5
23 x 5 115
8
Multiplying 2 digit by 2 digit
9
Step 1 How many boxes to you need?
47 X 12 You need 2 boxes on top and 2 on
the side.
10
Step 2 Set up the Lattice Box
4 7

1
2
11
Step 3 Multiply 4 by 1
4 7

1
2
0
4
12
Step 4 Multiply 4 by 2
4 7

1
2
0
4
0
8
13
Step 5 Multiply 7 by 1
4 7

1
2
0
0
7
4
0
8
14
Step 6 Multiply 7 by 2
4 7

1
2
0
0
7
4
1
0
8
4
15
Step 7 Add up the numbers between the slanted
lines.
4 7

1
2
If sum more than 9, carry by adding the number
to the slanted row to the left.
1
0
0
7
4
0
1
0
8
5
4
6
4
16
Step 8 Write the answer to the multiplication
problem.
4 7

1
2
47x12564
1
0
0
7
4
0
1
0
8
5
4
6
4
17
Step 1 How many boxes to you need?
783 X 532 You need 3 boxes on top and 3 on
the side.
18
Step 2 Set up your lattice box.
7 8
3
5 3 2
19
Step 3 Multiply 7 by 5, 3, 2.
7 8
3
3
5 3 2
5
2
1
1
4
20
Step 4 Multiply 8 by 5, 3, 2.
7 8
3
3
4
5 3 2
5
0
2
2
4
1
1
1
6
4
21
Step 5 Multiply 3 by 5, 3, 2.
7 8
3
1
3
4
5 3 2
5
0
5
2
2
0
4
1
9
1
1
0
6
4
6
22
Step 6 Add up the numbers between the slanted
lines.
If the sum more than 9, carry by adding the
number to the slanted row to the left.
7 8
3
1
1
1
1
3
4
5 3 2
5
0
5
4
2
2
0
4
1
9
1
1
1
0
6
4
6
6
6
5
5
23
Step 7 Write the sum of the multiplication
problem.
7 8
3
1
1
1
1
3
4
5 3 2
5
0
5
4
2
2
0
4
1
9
1
1
1
0
6
4
6
6
6
5
5
783 x 532 416,556