It isn't about about one off calcs but really about how the stack works over multiple operations. So you enter number 1, verify it, enter number 2, verify it, t

It isn't about about one off calcs but really about how the stack works over multiple operations. So you enter number 1, verify it, enter number 2, verify it, then do the operation. If you mess up, fix it now and go on. You can even go back and fix things on the stack if you notice a typo later. Multi step complex operations is where RPN really shines. Do multi step operation 1, then 2, then 3 as independent operations. When it comes time to combine the results of the 3 operations, they are just there on the stack waiting to be used. Without RPN you had to think about saving them to memory at the end of each operation, then remember were you saved them at the end. I had to switch from a std graph calc to RPN half way through collage and the first test I took with the 48G was a bit of a struggle. After the first 4 part question where the 4th step ended up being just combining the results from parts 1-3 that I had absentmindedly left on the stack I was sold. Just pressing + and * was SO much better then typing everything back in and verifying 3 numbers and hoping I didn't mess up a number.