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!
18. 3.42 * 6.9 =
Ok! I know how to do
Lattice, but I don’t
remember how to
multiply with
decimals!!!
19. 3.42 * 6.9
3 4 2
6
9
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.
20. 3.42 * 6.9
3 4 2
6
9
Place the decimal point above/beside the line in the grid.
.
.
21. 3.42 * 6.9
3 4 2
6
9
1
2
Multiply 6 * 2 and place the answer in the grid where the lines meet.
.
.
22. 3.42 * 6.9
3 4 2
6
9
1
24
2
Multiply 4 * 6 and place the answer in the grid where the lines meet.
.
.
23. 3.42 * 6.9
3 4 2
6
9
1
24
2
8
1
Multiply 3 * 6 and place the answer in the grid where the lines meet. Use a zero
as a place holder.
.
.
24. 3.42 * 6.9
3 4 2
6
9
1
24
2
8
1
8
1
Multiply 2 * 9 and place the answer in the grid where the lines meet.
.
.
25. 3.42 * 6.9
3 4 2
6
9
1
24
2
8
1
8
1
Multiply 4 * 9 and place the answer in the grid where the lines meet.
6
3
.
.
26. 3.42 * 6.9
3 4 2
6
9
1
24
2
8
1
8
1
Multiply 3 * 9 and place the answer in the grid where the lines meet.
6
3
7
2
.
.
27. 3.42 * 6.9
3 4 2
6
9
1
24
2
8
1
8
1
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.
6
3
7
2
8
.
.
28. 3.42 * 6.9
3 4 2
6
9
1
24
2
8
1
8
1
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.
6
3
7
2
89
.
.
29. 3.42 * 6.9
3 4 2
6
9
1
24
2
8
1
8
1
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.
6
3
7
2
89
+1
5
.
.
30. 3.42 * 6.9
3 4 2
6
9
1
24
2
8
1
8
1
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.
6
3
7
2
89
+1
5
3
.+1
.
31. 3.42 * 6.9
3 4 2
6
9
1
24
2
8
1
8
1
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.
6
3
7
2
895
3
. +1+1
2
.
32. 3.42 * 6.9
3 4 2
6
9
1
24
2
8
1
8
1
Now you need to place the decimal. Follow the lines until they meet.
6
3
7
2
895
3
. +1+1
2
.
33. 3.42 * 6.9
3 4 2
6
9
1
24
2
8
1
8
1
Now drop on the diagonal to place the decimal.
6
3
7
2
895
3
. +1+1
2
.
.
