Subtracting (or “taking-away”) may seem hard at first, but it’s easy once you know how to do it.

First, you write the sum in a column like this:

In this case, the sum is 31 – 17. The first subtraction you need to do is 1 – 7. This is impossible without giving a negative number. So, we have to “borrow” one from the number on the top-left, like this:

So now the first sum we have to do is 11 – 7, which is 4.

The next thing we have to do is 2 – 1, which is 1.

We now know that our total answer to 31 – 17 is 14.

Now you try

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