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The ten-key keypad is used for the calculator too. The button to swith between these modes is just aboc=ve the key and has a picture of a calculator. To use directional arrow keys, this keyboard comes with it's own separate arrow keys located under the delete button. They felt no need for directional function, number input function, and calculator function.
There is a "keypad" button somewhere on the keyboard, to cause those alphabetic keys to instead be interpreted like the keys on an adding-machine (or hand-calculator) -- very handy if you need to enter a lot of numeric data, and you are a "touch-typist" when using a hand-calculator.
Press the button to return the keyboard to "normal" mode.
Assuming you have a 12C Platinum, press f [RPN] to switch from the algebraic to the RPN mode. [RPN] is the shifted function of the CHS key on the top row of the keyboard.
I am going to assume that you are buying the non-cas version as the Cas or computer algebra version of the nspire doesn't support the ti-nspire mode.
The tinspire will come with two key-boards. One will be the nspire keyboard, the other the ti-84 board. To switch between them there is a small toggle on the back of the calculator. Push the switch and the keyboard will pop out. Put the ti-84 keyboard in and then press the on button!
There is no cube root key on the fx-115ES. There is a general root function. It's the shifted function of the x^ key, just below and to the right of the big round key at the top of the keyboard, above the sin key. To find the cube root of 8:
In LineIO mode: press 3 SHIFT [root] 8 =
In MathIO mode: press SHIFT [root] 3 right-arrow 8 =
You can download the guidebook for this calculator from TI here.
From page 16: To enter a number in scientific notation: 1) Enter up to 10 digits for the base (mantissa). If negative, press the +/- key. (The key has two curvy arrows between the + and - but I can't do that on my keyboard.) 2) Press the EE key. 3) Enter a 1 or 2-digit exponent. If negative, press +/- either before or after entering exponent.
They give the example 1.2345 +/- EE +/- 65 which would display -1.2345 -65.
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