The document provides a step-by-step guide on how to perform lattice multiplication with decimals, specifically for the multiplication of 3.42 and 6.9. It describes how to set up the grid, multiply each digit, and properly add the results, while taking care to place the decimal correctly in the final answer. The final result of the multiplication is 23.598.

1. Lattice Multiplication with Decimals Step-by-Step

2. 3.42 * 6.9 = Ok! I know how to do Lattice, but I don’t remember how to multiply with decimals!!!

3. 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.

4. 3.42 * 6.9 3 4 2 6 9 Place the decimal point above/beside the line in the grid. . .

5. 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. . .

6. 3.42 * 6.9 3 4 2 6 9 1 2 4 2 Multiply 4 * 6 and place the answer in the grid where the lines meet. . .

7. 3.42 * 6.9 3 4 2 6 9 1 2 4 2 8 1 Multiply 3 * 6 and place the answer in the grid where the lines meet. Use a zero as a place holder. . .

8. 3.42 * 6.9 3 4 2 6 9 1 2 4 2 8 1 8 1 Multiply 2 * 9 and place the answer in the grid where the lines meet. . .

9. 3.42 * 6.9 3 4 2 6 9 1 2 4 2 8 1 8 1 Multiply 4 * 9 and place the answer in the grid where the lines meet. 6 3 . .

10. 3.42 * 6.9 3 4 2 6 9 1 2 4 2 8 1 8 1 Multiply 3 * 9 and place the answer in the grid where the lines meet. 6 3 7 2 . .

11. 3.42 * 6.9 3 4 2 6 9 1 2 4 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 . .

12. 3.42 * 6.9 3 4 2 6 9 1 2 4 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 9 . .

13. 3.42 * 6.9 3 4 2 6 9 1 2 4 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 9 +1 5 . .

14. 3.42 * 6.9 3 4 2 6 9 1 2 4 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 9 +1 5 3 . +1 .

15. 3.42 * 6.9 3 4 2 6 9 1 2 4 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 9 5 3 . +1 +1 2 .

16. 3.42 * 6.9 3 4 2 6 9 1 2 4 2 8 1 8 1 Now you need to place the decimal. Follow the lines until they meet. 6 3 7 2 8 9 5 3 . +1 +1 2 .

17. 3.42 * 6.9 3 4 2 6 9 1 2 4 2 8 1 8 1 Now drop on the diagonal to place the decimal. 6 3 7 2 8 9 5 3 . +1 +1 2 . .

18. 3.42 * 6.9 3 4 2 6 9 1 2 4 2 8 1 8 1 Your answer is 23.598!! 6 3 7 2 8 9 5 3 . +1 +1 2 . .

19. 3.42 * 6.9 = 23.598 That is Soooo Cool!!! Thanks!