Home Mode Calculation option

[KeithB]

(08-12-2017 12:22 AM)toml_12953 Wrote:  

(08-11-2017 09:58 PM)KeithB Wrote:  I really like the HP71 calc mode where it calculates as much as it can as you enter it.

For example if you enter 30+20+30, as soon as you hit the '+' after 20 it knows that no other operations will affect the first result so it displays '50' instead of '30+20'.

If you enter 30+20*30 it won't calculate anything since the values may depend on the next operation.

It find it really useful when adding a bunch of numbers to get a running subtotal.

(I know the ANS function provides some of that functionality, but it requires extra keystrokes.)

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.

Actually, the '29' is easy, backspace will undo the pre-calculation and let you make the change, the '30' is harder since you have to backspace away the '29'.