Lattice Multiplication

Found this on the Net - just great

1. Lattice Multiplication
Step-by-Step

2. 356 * 25 =
I don’t
remember how
to multiply!!!

3. HELP!!! I can help!! Let me
show you how to
do Lattice
Multiplication.

4. 356 * 25
3 5 6
2
5
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. 356 * 25
3 5 6
2
5
1
2
Multiply 6 * 2 and place the answer in the grid where the lines meet.

6. 356 * 25
3 5 6
2
5
1
20
1
Multiply 5 * 2 and place the answer in the grid where the lines meet.

7. 356 * 25
3 5 6
2
5
1
20
1
6
0
Multiply 3 * 2 and place the answer in the grid where the lines meet. Use a zero
as a place holder.

8. 356 * 25
3 5 6
2
5
1
20
1
6
0
0
3
Multiply 6 * 5 and place the answer in the grid where the lines meet.

9. 356 * 25
3 5 6
2
5
1
20
1
6
0
0
3
Multiply 5 * 5 and place the answer in the grid where the lines meet.
5
2

10. 356 * 25
3 5 6
2
5
1
20
1
6
0
0
3
Multiply 3 * 5 and place the answer in the grid where the lines meet.
5
2
5
1

11. 356 * 25
3 5 6
2
5
1
20
1
6
0
0
3
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
2
5
1
0

12. 356 * 25
3 5 6
2
5
1
20
1
6
0
0
3
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
2
5
1
00
+1

13. 356 * 25
3 5 6
2
5
1
20
1
6
0
0
3
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
2
5
1
00
+1
9

14. 356 * 25
3 5 6
2
5
1
20
1
6
0
0
3
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
2
5
1
00
+1
9
8

15. 356 * 25
3 5 6
2
5
1
20
1
6
0
0
3
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
2
5
1
00
+1
9
8

16. 356 * 25 =
8,900
That is Soooo
Cool!!!
Thanks!