1. Lattice Multiplication
Melton
Lattice Multiplication

2. 4 6 7 9 Step 1 46 x 79 Draw a set of 2 by 2 boxes.
2) Cut the boxes in half diagonally. 9
3) Place the numbers on the outside of the boxes

3. Step 2 4 6
46 x 79 2 4 7 8 2
Multiply the number that is on the top of each box with the number that is to the right of each box. Place the answer in the box with one digit to the left of the diagonal line and one digit to the right. 3 5 9 6 4
4 x 7 = 28
6 x 7 = 42
4 x 9 = 36
6 x 9 = 54

4. Step 3 4 6
46 x 79 2 1 1 4 7 3 8 2
Add the numbers in the boxes diagonally and carry into the next column if needed. 3 5 9
2) Start with the 4. 6 6 4
3) Add = 13 and place the 3 at the bottom and carry the 1. 3 4
4) Add = 16 and place the 6 at the bottom and carry the 1.
The answer is 3,634.
5) Add = 3

5. 5 1 1 8 Step 1 51 x 18 Draw a set of 2 by 2 boxes.
2) Cut the boxes in half diagonally. 8
3) Place the numbers on the outside of the boxes

6. Step 2 5 1
51 x 18 1 5 1
Multiply the number that is on the top of each box with the number that is to the right of each box. Place the answer in the box with one digit to the left of the diagonal line and one digit to the right. 4 8 8
5 x 1 = 5
1 x 1 = 1
5 x 8 = 40
1 x 8 = 8

7. Step 3 5 1
51 x 18 1 5 1
Add the numbers in the boxes diagonally and carry into the next column if needed. 4 8
2) Start with the 8. 9 8
3) Add = 1 and place the 1 at the bottom. 1 8
4) Add = 9 and place the 9 at the bottom.
5) Place a 0 at the bottom of the last one.
The answer is 918.

8. 3 8 9 Step 1 38 x 9 Draw a set of 1 by 2 boxes.
2) Cut the boxes in half diagonally.
3) Place the numbers on the outside of the boxes

9. Step 2 3 8
38 x 9 2 7 9 7 2
Multiply the number that is on the top of each box with the number that is to the right of each box. Place the answer in the box with one digit to the left of the diagonal line and one digit to the right.
3 x 9 = 27
8 x 9 = 72

10. Step 3 3 8
38 x 9 2 1 7 9 3 7 2
Add the numbers in the boxes diagonally and carry into the next column if needed. 4 2
2) Start with the 2.
3) Add 7 + 7= 14 and place the 4 at the bottom and carry the 1.
4) Add = 3.
The answer is 342.

11. 3 2 4 9 5 Step 1 324 x 95 Draw a set of 2 by 2 boxes.
2) Cut the boxes in half diagonally. 5
3) Place the numbers on the outside of the boxes

12. Step 2 3 2 4
324 x 95 2 1 3
Multiply the number that is on the top of each box with the number that is to the right of each box. Place the answer in the box with one digit to the left of the diagonal line and one digit to the right. 9 7 8 6 1 1 2 5
3 x 9 = 27 5
2 x 9 = 18
4 x 9 = 36
3 x 5 = 15
2 x 5 = 10
4 x 5 = 20

13. Step 3 3 2 4
324 x 95 1 1 2 1 3 9
Add the numbers in the boxes diagonally and carry into the next column if needed. 7 3 6 8 1 1 2
2) Start with the 0. 5
3) Add = 8. 5
4) Add = 17 and place a 7 at the bottom and carry the 1 to the next diagonal column. 7 8
5) Add = 10 and place a 0 at the bottom and carry the 1 to the next diagonal column.
The answer is 30,780.
6) Add = 3.