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All calculator use scientific notation if the result is too small or too large. Some, like the Casio FX9750G II, offer you two Normal displays, Norm1 and Norm2 that have different limits when numbers are converted to scientific notations. Here is how to set one or the other. In Run>Mat press SHIFT MODE (Setup). Scroll down or up to reach the display line. Press F3 to select Norm1 or Norm2.
You've got the display set to fixed decimal notation. To change it, press SHIFT MODE 7 to switch to a scientific notation or SHIFT MODE 8 and then 1 or 2 to switch to one of the norm display modes.
norm1 switches to scientific notation if the magnitude of the number is less than 0.01 . norm2 switches to scientific notation if the magnitude of the number is less than 0.000000001 .
Press 2nd [SCI] to switch the calculator to display all results in scientific notation. The results are the same whether you do it in scientific notation or not, it's just how the number is displayed.
Unfortunately, you don't. For numbers whose magnitudes differ too greatly from 1, the calculator automatically switches to scientific (or engineering) notation. You can press MODE and change the display settings, but there is no setting that will force the calculator to show this number without an exponent.
This can be done by setting the calculator to the right MODE. Press MODE 9 to turn on scientific notation. For example, compute 1 / 200 = and you will see 5 with a -03 exponent in the upper right. Press MODE 9 again and it will be displayed .005
To enter numbers in scientific notation use the EXP at the bottom. To enter .005, press 5 then EXP then +/- then 3. You will see it displayed. Then you can perform calculations with this entered number.
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