http://library.thinkquest.org/10796/ch1/ch1.htm I have some down time for the next 3 months and figured I might as well do something constructive and teach myself physics. I am doing so on thee above website, but question 2 on section 3 has me stumped. This section is about when and how to properly round, but I am baffled. Question: -9.300 + 2.4 * 3.21 I am getting -22.149 which properly rounded would be -22, but they are saying it is -1.6 This just can't be right If you put the wrong answer in enough times it will give you the correct answer. Thank you in advance for all help.