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There are a number of methods for multiplying two numbers together.

One that is very popular (even if it's a bit slower than other methods) is the grid method.

 

 

e.g. Calculate 36 x 25.

 

Step 1: Split the numbers up.  ->  36 = 30 + 6 and 25 = 20 + 5

 

Step 2: Create a grid and put the numbers around the outside.

 

  30 6
20    
5    

 

 

Step 3: For each of the spaces in the grid, multiply the number on the top by the number on the left side.

 

  30 6
20 600 120
5 150 30

 

 

Step 4: Add all these numbers together.

 

600
+   120
+   150
+     30
900

 

 

 

Before you start this activity, make sure you have a pen and paper handy so that you can create your own grids as we go. 

 

Let's get started!

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