Home Mode Calculation option

[KeithB]

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.)