![]() ![]() The leftmost diagonal has only one number: 0 (from the 08 in the upper box). ![]() The next diagonal has 1 (from the 12 in the upper box), 0 (from the 10 in the lower box), and 0 (from the 08 in the upper box): 1 + 0 + 0 = 1.The next diagonal has 1 (from the previous box), 2 (from the 12 in the upper box), and 0 (from the 10 in the lower box): 1 + 2 + 0 = 3.The rightmost diagonal has only one number: 5.If a diagonal’s sum is more than 9, carry the tens digit over to the next diagonal. The grid should look like this:ĥ | 10 | 15 Step 5: Add Along the Diagonalsįinally, add the numbers along the diagonals from the bottom right to the top left. The top right box is 3 (from 23) times 4 (from 45), which is 12, so write 12 in the box. If the result is a single digit, put a zero in the top triangle.įor example, the top left box represents 2 (from 23) times 4 (from 45), which equals 08, so write 08 in the box. Write the result inside the box, with the tens digit going in the upper triangle (above the diagonal) and the ones digit going in the lower triangle (below the diagonal). Now, for each box, multiply the digit at the top of the column by the digit at the end of the row. The line should start from the bottom right of each square and end at the top left. Your lattice should look like this:ĭraw a diagonal line through each square. Write the second number, 45, along the right side of the grid, one digit beside each row. Write the first number, 23, along the top of the grid, one digit above each column. Step 1: Draw the Lattice Gridĭraw a \(2×2\) square grid for our example because we have two digits in both numbers. Here’s a step-by-step guide on how to use it: This method is quite visual and can help you see how multiplication works, especially with larger numbers. Lattice multiplication is a fun and different way to multiply numbers. + Ratio, Proportion & Percentages PuzzlesĪ Step-by-step Guide to Using Lattice Multiplication Method.
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