Aside from the standard multiplication algorithm we know, and the Line Multiplication which I already discussed, there is another method that we can use to multiply. This is called lattice multiplication. We can do this in multiplying 2-digit by 2-digit numbers but it can be expanded to numbers with higher number of digits. The steps of are as follows.
Step 1: Create 2 by 2 grid and place the numbers you want to multiply at the top and at the right side as shown below. In this case, we want to multiply 83 by 42.
Step 2: Draw diagonals in each grid. This forms two triangles. These triangles will contain the digits of the product. As shown below, the yellow square will contain the product of 3 and 2. Continue reading