Calculator usage: binary, octal, and hex on the Casio fx-991ES PLUS C, part 1

Tutoring math and comp sci, specific device functions can be important. The tutor mentions how to convert from decimal to binary, octal, or hexadecimal with the Casio fx-991ES PLUS C.

The following is according to my understanding.

Some people might have noticed the green print above the x², x^▪, log, and ln keys: DEC, HEX, BIN, OCT. Yet, how does one access that functionality?

To do so, one can press MODE, then 4:BASE-N. Immediately, Dec appears above 0, signifying DEC (decimal) mode. Decimal mode is what people usually think in.

To convert from decimal to another base – for instance, binary – one first needs to key the number, then press =. Then, to convert that number to binary form, Shift, then log. Notice that the log key has BIN printed across the top.

Example: convert 89 to binary, octal, and hex.

Solution:

1. MODE, then 4. One should see Dec above 0.
2. 89, then =. One should see Dec above 89.
3. To convert to binary, Shift then log. One should see Bin above a line of zeros with 1011001 at the end.
4. To convert to octal, Shift then ln. One should see Oct above some zeros with 131 at the end.
5. To convert to hex, Shift then x^▪. One should see Hex above 59.
6. To return to dec, Shift then x².

Importantly, to get back to normal computation mode, press MODE then 1.

I imagine I will have more posts to add about this general topic, but this seems enough for an introduction.

Source:

casio.com: fx-991ES PLUS C User’s Guide