Sorry, I meant children (rather than anyone younger than you are, which seems to be how some people use the word kids). While I agree with being able to check

Sorry, I meant children (rather than anyone younger than you are, which seems to be how some people use the word kids). While I agree with being able to check the results with many modern calculators, my argument is that it is useful to know when the results have to be checked. For example: if you know that all of the points are less than 5 and you are adding 20 of them together, a result greater than 100 means you have to go back and check what was entered.