16th October 2016

Adding

Adding is a simple process and can be very easy to do.

Adding 2 digit numbers

Adding two-digit numbers can be done using this method:
adding-diagram-1

Carrying over

If you come across a sum such as 75 + 46, the 5+6 stage will be different to previous examples.
adding-diagram-2
Now, 5 + 6 = 11, but we can’t display both digits. So we put 1 in the answer box and then carry one over.
Now, instead of 7 + 4, we add 7 + 5. Or you can just add the 1 afterwards. So the answer is 121!

Now you try

Interactive quiz

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Now you try | Answers