To add or subtract sig figs, it is to my understanding that the answer is reported so that it reflects the least precise number.
For the example 43.4 - 22 - 3, would I report my answer as 18 or 20?
Thanks. Any help is very much appreciated!
The Attempt at a Solution
The least precise number is 3 but I am not sure if I would report my answer with 1 or 2 sig figs. I am guessing that my answer should be 20 since it has only one significant figure as well.