2. Lattice Multiplication is an alternative way of doing higher level multiplication.

3. By creating a series of grids (boxes) and following a few rules you can easily and neatly find the product to large numbers.

4. Today’s Example: 64 x 9 =

5. First, write the larger number down.

6. 6 4

7. Draw a rectangle below this number.

8. 6 4

9. The larger number is made up of 2 digits, so cut the rectangle into two boxes.

10. 6 4

11. Write the other problem number on the right of the rectangle.

12. 6 4 9

13. Cut the boxes diagonally. For each box draw a line from the bottom left to the top right.

14. 6 4 9

15. Now we do basic multiplication. Start with the 6. If we go down from the 6 and across from the 9 they “meet” in that first box.

16. 6 4 9

17. 6 x 9 = 5 4 Write 5 in the top half of the box and write 4 in the bottom half of the box.

18. 6 4 9 5 4

19. Move on to the 4. If we go down from the 4 and across from the 9 they “meet” in that second box.

20. 6 4 9 5 4

21. 4 x 9 = 3 6 Write 3 in the top half of the box and write 6 in the bottom half of the box.

22. 6 4 9 5 4 3 6

23. Extend your diagonal lines down.

24. 6 4 9 5 4 3 6

25. Add the numbers inside the boxes. Use the diagonal lines to guide you. Start on the right with the 6 then move to the left. 6 + nothing = 6. So put a 6 on the right of the diagonal lines.

26. 6 4 9 5 4 3 6 6

27. 3 + 4 = 7. So put a 7 between the diagonal lines.

28. 6 4 9 5 4 3 6 6 7

29. 5 + nothing = 5. So put a 5 to the left of the diagonal lines.

30. 6 4 9 5 4 3 6 6 7 5

31. That’s it! 576 is your answer. 6 4 x 9 = 5 7 6

32. ON YOUR OWN Try the following problem using the rules from the example. The answer will be the first thing given in TUTORIAL 2.

33. On Your Own Problem: 52 x 7 =