Nope not a math professor but a Biomechanics/Exer Phys and Applied statistics professor. But yes I know the rules for rounding...However, it's easy to always argue why whatever grade should be rounded up....why not 86 = 90? If grades are based on the "every 10 points or % is a new grade" then why not round by the 10s instead of the ones which means an 85% is rounded to an A = 90%?Flagpoles twin sister wrote:

Well, obviously none of the teachers/professors are math teachers.

Because then this would be very easy to figure out.

Grades are (usually) as follows: 100-90 a, 80-89 b, etc...

An 89.5 rounds to 90, I learned this in first grade math, I don't know what is so hard to understand about that.

People say "how do you know an 89.4 doesn't round to a 90 also?"

...well, did you take first grade math? That's how, retard.

As a math major, I hope none of you jack*ss idiots are ever my teacher.

But let's look at the whole point of rounding...precision. What if I give 2 exams (mid-term & final) which determine your whole grade and 90% is an A. Each test has 200 questions and you scored 179 on each exam. You earned a precise 89.500000 so no need to round since I can get your exact grade and you earned a B right?