#Lattice multiplication grids series#

The tens and ones are split on either side of the diagonal line. For example, in the top right corner, we are multiplying 8×3 to make 24.

$lattice multiplication grids$

We multiply the numbers that meet in each space on the grid. Step 2: Next, we arrange the factors along the top and right side of the grid, as shown below. For example, if you are multiplying a 2-digit by 2-digit equation, your grid will have two rows and two columns. The number of rows and columns will depend on the number of digits in the factors. To solve this equation, we follow the steps below: Let’s begin with an equation that does not require regrouping: 18 x 31. I’m going to explain this strategy step-by-step, with lots of pictures, but if you’d rather watch my Lattice Multiplication video, simply press “play” below! Otherwise keep scrolling for the step-by-step instructions. This is especially helpful when it comes to regrouping, as the numbers that are carried are also written within the grid to make the adding easier. Lattice multiplication utilizes a grid to keep numbers organized. How do you perform lattice multiplication? Looking for support with teaching this strategy and many others for multi-digit multiplication? See The Multi-Digit Multiplication Station (a self-paced, student-centered approach) HERE. If your students have mastered those mental math based strategies, and are ready for more, this is a fun one to teach! I do believe that before you teach this method, you should focus on mental math strategies that DO encourage number sense understanding, such as the partial products strategy, or box/window method (area model). Once students have a solid understanding of the place value concepts behind multiplication, some can thrive with traditional methods such as long multiplication, or this alternative – lattice multiplication. So why would you want to teach this strategy? Now let me begin this post on lattice multiplication by saying that this is not necessarily one of those strategies that enhances number sense understanding.

#Lattice multiplication grids series#

We teach math in a way that enhances number sense understanding, so that students really understand what they are doing, rather than just memorizing a series of steps. We know that number sense is an essential component of today’s classrooms. Before I begin explaining this strategy, I do want to take a second to talk about multi-digit multiplication strategies in general. Lattice multiplication is an alternative to traditional long multiplication.