Lattice Multiplication is one of my favorite strategies for teaching multiplication.
Here's how it works:
Let's say you are given the problem
254 x 37 = ?
First, line up the first number across the top and the second number down along the side:
Next, multiply the single digits on the top by the single digits on the side to fill in the squares accordingly:
Last, add along the diagonal columns to find your answer. You may have to carry double digit sums to the next space.
So, in in this case the answer would be 9,398
I give my students a copy of two blank lattice grids that they keep in a sheet protector. They use these grids with dry-erase markers to solve multiplication problems they come across. I also teach them how to draw the grids on their own so that they will be able to use this strategy on standardized tests.
Click the picture below to share my blank lattice grid.
Feel free to comment if you have any questions about this strategy!