Edward C. answered • 03/21/15

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Caltech Grad for math tutoring: Algebra through Calculus

I don't know what kind of calculator you have. Mine has 2 ENG keys (ENG stands for Engineering units) above the multiplication and division keys. So if I enter 405/65536 I will get

6.17980957E-03

If I then press the SHIFT key and ENG (left) above the multiplication key I will get

0.006179809E0

which I think is what you are looking for. By the way, these keys are called Engineering units because they move the X 10 exponent to different multiples of 3, which is nice for converting things from meters to kilometers and millimeters and so forth.

If you don't have a key like that on your calculator you can try this little trick. When you get a result like

6.17980957E-03

on your calculator, multiply by 10 raised to a power of one less than the absolute value of the exponent (in this case that would be 10 squared = 100) to get a number with no exponent, in this case

0.617980957

Of course then when you write that number down you have to remember to put the 2 leading zeroes back in to get

0.00617980957