Recall that any number can be written in scientific notation (or normal form): \[\pm[\text{\textit{number between 1 and 9.999...}}]\times10^{integer}. \comment{change\ notation?}\]
For example, \(142857=1.42857\times10^5\).
The TI-Nspire uses the symbol E for scientific notation. It means \(\times10^{...}\). For example, if you compute \(4.51*10^{11}\) the calculator should display 4.51.E11.
By default, any number between \(0.001\) and \(999'999'999\) will not be written in scientific notation. You can change that so any number is written in scientific notation. Press and select Settings & Status > Document Settings. Choose Exponential Format as Scientific as below :
Press . Typing \(142857\) should thus display 1.42857.E5.
If you are struggling with rounding, you can set-up the calculator to display any amount of decimals (between \(0\) and \(9\)).
Suppose you want to display a number up to \(3\) decimals. To do so, press and select Settings & Status > Document Settings. Choose Display Digits as Float 3 as below :
Press .
If you type \(0.1234\) the calculator should display 0.123 or 1.23.E-1 (scientific notation) . If you want to switch back do the same process but choose Float instead of Float 3.
Press .