HP 39gII - Chapter 5: The MATH Menus; The Math Menu; Units

The Math Menus 51
The Math Menus
51
5 The Math Menus
The MATH Menu
Press the Math key to see an extensive menu of advanced math commands in a two-column
table. The first column contains a list of categories and the second column shows the
commands in each category. Use the up- and down-cursor keys to scroll through the lists;
use the left- and right-cursor keys to switch between the columns. Highlight the command
you want and press the OK menu key to paste it into an edit line, or press the CANCL menu
key to return to the edit line.
Press the CATLG menu key to see an alphabetical list of all functions, commands, and
variables that the HP 39gII has to offer. Select an entry and press the OK menu key to paste
it to the cursor location, or press the CANCEL menu key to close the catalog.
You can always type in any command letter-by-letter, and the HP 39gII will accept it.
Units
Units can be attached to numerical values, and calculations can be performed on numbers
that have units, even differing units. For example, to enter 5 cm, type 5, then press Math to
open the Math menu and press the UNITS menu key to open the Units menu. Scroll down
the categories on the left to find Area, then scroll to the right and down to find _cm. Press the
OK menu key and the unit is attached to the number with an underscore: 5_cm. You can
now add 5_cm + 2_in to get 10.08_cm.