How do you do it?  


Most people probably assume that the way they learned to subtract is the way that everybody else does it
– but there is more than one ‘pencil and paper’ method. I am really interested to know which way you do it.


Some people are surprised to find that even their nearest and dearest do it differently, and I would really like to gather some data on that, too. So if you can get others in your family to look at this with you, that would be great!

Here are the two main methods (there are others). Please check the boxes below according to how you and your family do it.

Subtraction by
Equal Addition


Subtraction by


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Who does it this way (A)
Did you know there was another way to do it
Who does it this way (B)