To round on the Casio FX-991DE X, follow these steps:
## Setting the rounding - Press the `[SHIFT]` button and then the `[MODE]` button to enter the setup menu. - Select the option `6` (FIX). - Enter the number of decimal places you want to round to (e.g. `2` for two decimal places).
## Example - Press `[SHIFT] + [MODE]`, then `6` (FIX), and finally `2` for rounding to two decimal places.
## Deactivating the rounding function - To deactivate the rounding function and return to the standard display, press `[SHIFT] + [MODE]`, then `8` (Norm) and finally `1`.
These settings ensure that all calculations are rounded to the desired number of decimal places.
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