Lattice Multiplication
Draw a table with the number of digits to be multiplied and write the numbers on the top and right.
1
Draw diagonal lines in each cell from the top right down to the bottom left.
2
Multiply the number on the top of the box to the number on the right of the box.
3
Add the numbers on the same diagonal path. Carry over to the next column if necessary.
4
Combine the digits from top to bottom then from left to right.
5
Try it yourself!