Not a calculator engineer but this seems hideously complex?
> We no longer receive bug reports about inaccurate results, as we occasionally did for the 2014 floating-point-based calculator
(with a footnote: This excludes reports from one or two bugs that have now been fixed for many months. Unfortunately, we continue to receive complaints about incorrect results, mostly for two reasons. Users often do not understand the difference between degrees and radians. Second, there is no standard way to parse calculator expressions. 1 + 10% is 0.11. 10% is 0.1. What’s 10% + 10%?)
When you have 3 billion users, I can imagine that getting rid of bugs that only affect 0.001% of your userbase is still worthwhile and probably pays for itself in reduced support costs.
I know adding % has multiple conventions, but this one seems odd, I'd interpret 1 + 10% as "one plus 10 percent of one" which is 1.1, or as 1 + 10 / 100 which happens to be also 1.1 here
The only interpretation that'd make it 0.11 is if it represents 1% + 10%, but then the question of 10% + 10% is answered: 0.2 or 20%. Or maybe there's a typo and it was supposed to say "0.1 + 10%"
(1+10)%
Which is 11% or 0.11
I expected 1.1 (which is what my iOS calculator reported, when I got curious).
I do understand the question of parsing. I just struggle to understand why the first one is confidently stated to correctly result in a particular answer. It feels like a perfect example itself of a problem with unclear parsing.
Its like: Hey little Bobby, now that you can count here are the ints and multiplication/division. For the rest of your life there will be things to learn about them and their algebra.
Tomorrow we'll learn how to put a ".25" behind it. Nothing serious. Just adds multiple different types of infinities with profound impact on exactness and computability, which you have yet to learn about. But it lets you write 1/4 without a fraction which means its simple!
That’s just not true for the vast majority of people.
1/4 = 0.25 exact
1/3 = 0.333... infinitely repeating approximation 1/1 a
1/2 ah
1/3 aH!
1/4 ahh
1/5 ah
1/6 ahH!
1/7 aHHHHHH!
1/8 ahhh
1/9 aH!
1/10 ah
1/11 aHH!
1/12 ahhH!
1/13 aHHHHHH!
1/14 ahHHHHHH!
1/15 ahH!
1/16 ahhhh
1/17 aHHHHHHHHHHHHHHHH!
1/18 ahH!
1/19 aHHHHHHHHHHHHHHHHHH!
1/20 ahh
If you really understand the existing math curriculum this should be high school level.