Excel: 2 + 2 = 5

How can 2+2 be 5?

According to Excel it’s possible!

Of course, Excel doesn’t make mistakes like that, so it’s down to how you use the application. If you’re not careful, you might deliver a report to your boss one day which concludes that 2+2 equals 5!

Let’s increase the number of decimals:

Now it makes sense; 2,49 + 2,49 = 4,98

Excel does calculate correctly even if you use the Decrease Decimals feature. It just doesn’t always look that way…
Author: Audun Danielsen


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