fx-300ESPlus2: Calculating Measures of Central Tendency

Using the fx-300ES+2 scientific calculator, see how to calculate measures of central tendency using the calculator commands. You can find mean and median using the Statistics Menu commands, however on this calculator, you cannot find the mode - this will need to be done visually/manually.

[@DougFLA123]

If I come up with a value of 300 (for example) and I want to subtract it from 600, where is the +/- key so I can just turn the 300 to -300 and add it to 600? There must be a way to turn a positive number to a negative number the way millions of calculators have done in the past.