Huh? I don't know why this works (or doesn't work, actually)

Do the following calculations:

Take 1000 and add 40 to it.



Now add another 1000.


Now add 30.


Add another 1000.


Now add 20.


Now add another 1000.


Now add 10.
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What is the total? Scroll down for answer..



















Is this weird, or what?   Did you get 5000?  The correct answer is actually 4100.  Try it on your calculator now. . .
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