I haven't taken math since 9th grade and no desire to. So I am one of the dummies that doesn't know basic math and came up with 1.
I would love to know how some came up with 3.5.
Well, 3.5 isn't right, but here is what I suspect the faulty logic was:
"Zero is nothing. So ignore it."***
7/2 = 3.5
*** This was probably either an actual thought, or the person got mixed up with the rules about multiply by zero and 1. Possibly confusing it with the exponent rule? In other words, I'm not quite sure what their logic on this step was, only that I'm pretty sure that's the way the rest of it went.
Now if the problem looked like this:
--------------- = ?
Then 3.5 would be the correct answer (Do exponents first, 1^0=1. Then 6-1+2 =7. Then 7/2 = 3.5). So maybe they just misread the multiplication sign and screwed up the order of operations on division?
Thanks to the last 2 posters. He has now seen his mistake and corrected himself and came up with 7.
I used to make a lot of mistakes on the simplest parts of math/chem/physics problems in high school. Something that helped me a lot was restructuring the way I wrote my math notes when reducing equations. I'd write every version immediately beneath the prior version, with each part lined up vertically, so that it was easier to notice when I'd transposed something, flipped a sign, etc. This helped me a lot in avoiding small errors.
Thank you. I will share this with him. I am very surprised he missed it. He got 100% in Algebra honors last year in a class with students that were 2 grades ahead of him.
Geometry honors is not going so well. However, engineering is going very well, so I don't get it.
For what it's worth, geometry is kind of a different type of math - it takes a different way of looking at things than the number crunching with algebra. I know a lot of students who did well in algebra and struggled with geometry and just as many that struggled with algebra but did well with geometry. Knowing that you have to approach it differently seemed to help a lot psychologically.
Do you know if his geometry is proof based?