subtraction

Arithmetic Grade Two

Look at this subtraction problem:


     32
    - 8 
   -----

To solve this problem, we regroup like this:


    tens   |   ones
   --------|---------
       2   |    12
    -      |     8
    -----------------
       2   |     4

Here's another easy example:


     44
    - 7 
   -----

Here's the same problem after regrouping:


     3  |  14
   -    |   7 
   ------------
     3  |   7