#Lattice method multiplication how to#
Here’s the picture, I’ll explain how to do this step in just a bit. So we put that in the target cell, with the first digit on top and the second on bottom. What is the product of “9” and “5”? Well, 45. The number “9” from 3291 and the number “5” from 5 intersect at a specific cell in the grid. Otherwise, we just put the number in the lower part of the cell. If the product consists of two digits, we put the first one in the upper part of the cell and the second one – in the lower. So, for every such cell, we put inside of it the product of the two digits – one on top of the cell, the other on the right of it. For instance, the top-left cell is, actually, the intersection of the digit “3” and the digit “5”. Think of each cell as the intersection of two digits. Each cell, therefore, is divided into two halves by our diagonal lines. Only two steps left to go! Let’s review what we’ve done.So far, so good! Now we draw diagonal lines in the bottom-left direction, starting from all the top and right edges of the grid:.
Next – we put the two numbers as I mentioned before – one on top, the other on the right, like so:.So, we need as many columns as there are digits in the first number, and as many rows as digits in the second number. Let’s create a small grid (table), just large enough to put one number alongside horizontally, and the other number alongside vertically.First I’ll tell you about the method, then I’ll explain all its perks. It is different from the traditional “school” way of multiplying, and, in many respects, better. Hello, guys! Been a while since my last post… Anyway, here I am today explaining a method of multiplication known as the “ lattice“.
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