22 October 2011

Addition in Columns

You can do addition by writing one number below the other and then add one column at a time. Please click play button to see addition animation:

And it works for bigger numbers, too:

But sometimes two-digit numbers can get in the way like this:

THIS is how it should be done:

Did you see how we split the 12 into 1 Ten and 2 Units?
We then sent the 1 Ten to the top of the Tens column, so we will remember to add it when we do the Tens.
And there is a nice clear space for the Tens answer below.


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