Home Mode Calculation option

[Joe Horn]

(08-12-2017 12:22 AM)toml_12953 Wrote:  The way Prime does it, you can edit the calculation before submitting it.
Suppose I enter

30 + 29 +

but then realize I meant 20 instead of 29. How would you correct that on the 71? On the Prime you can just back up the cursor and correct the number without having to back out of the addition.

There are two ways of dealing with typos on the HP-71B in CALC mode.

(1) Press the BACK key (not left-cursor). Just like on most modern calculators, you can backspace through the current CALC expression to correct typos. Although BACK is a shifted key on the HP-71B, the shift key is optional in CALC mode if you install CALCLEX or JPCLEX or JPCROM.

(2) Just execute the incorrect calculation, then press up-cursor to access the history stack, where you can edit the entire expression (not only its right end), just like on the Prime. Although this might seem like an awkward way to handle it, it's very keystroke efficient.