I need some serious maths help

Think of it this way-you want to put all of them over the same thing, in this case it turns out to be 6(you want the lowest common multiple of the denominators), so you try to work out what they each are.
First:
9/2=x/6
How do you work out x? Since you multiply the bottom by 3 to get from 2 to 6, you must do the same to 9, so x is 9*3. Make sense?

I just CAN'T get my head around adding more than two mixed numbers, could some please explain to me, like you're explaining to a young child, how to do it, this is the way my teacher said but it doesn't make any sense

for instance

4 1/2 + 3 5/6 + 2 1/3

Find common lower number (denominator) =6

Change to top heavy fractions

9/2 + 23/6 + 7/3

Make denominator 6

9*3/6 + 23/6 + 7*2/6

Ok this is where I am confused as hell, WHY do I have to say 9 times 3 and 7 times 2!? I don't get it at all, because how does that equal the denominator 6? how is that in any relation to 6, oh someone help me please I am going to go insane

Anyway he moves on to this

27/6 + 23/6 + 14/6= 64/6 = 10 2/3

that bit is simple enough but its the other bit, the 9 times 3 and 7 times 2, where the hell did he get that from, this is really depressing me, I feel so stupid, I just don't understand why 9*3 would equal the denominator 6 and 7 times 2 equal donominator 6, oh kill me, oh gosh this is terrible

.

Lets just deal with the first one, the topheavy fraction being 9/2. If you wanted the denominator to be 4, then you have doubled the bottom. And whatever you do to the bottom, you have to do to the top. So you double the top, 9*2 = 18. So 9/2=18/4

So the same goes when you want the denominator to be 6. You have multiplied it by 3, so you need to do the same to the top Does that makes more sense now?

Okay, not the best explanation by any means but:

So you wan't to add the fractions together yh; and you know that the denonminators have to be the same. You also have to remember that the number has to be the same value as before otherwise you wont be adding the same three numbers together. So what you do is times the number by 1, BUT look how it works:

9/2 * 3/3 (which is one) = 27/6
23/6 * 1/1 (which is one) = 23/6
7/3 * 2/2 (which is one) = 14/6

See how you get what your teacher got now.

Do you understand that these are all the same

$\frac{8}{6} = \frac{80}{60} = \frac{4}{3} = \frac{16}{12}=$

etc

Right now I'm even more confused what do you mean 1!? Where you getting one from, and it's still not explaining why 9 has to be times'd by 3 or why 7 has to be times'd by two because they have no relation to 6, I might aswell times they them by any number I like, why 6? why not 4? or 8? seriouisly wtf

Yeah but that has got nothing to do with my question, I want to stick to my question

okay. You don't wanna be changing the numbers that your adding together so that they're different to the question, so you have to do the same to the top and bottom so that the number stays the same.

You want to get all the denominators the same so that you can add the three fractions together right? Thats the point of the question. So you need to find the lowest common factor of all the denominators, which happens to be six. With that knowledge you now must make all the fractions go so that they're over 6. And you have to remember than you times the top and bottom by the same.

yes it has

so you have $\frac{9}{2}$

do you know that you can find as many fractions that are the same as that as you wish (as per my example)

but how the hell does 9 times 3 or 7 times 2 equal 6!!!!!!???? It doesn't even divide into it!!!!! I am going to blow my head off this is terrible, i want to know why he said 9 times 3 and 7 times 2, no one is explaining the relationship it has between 6!!!!!!!!!!!!

but how the hell does it!!!!!!!!!!!!!!?

No because 9 times 3 doesn't equal 6 nor does 7 times 2, they don't even devide evenly into six ffs!

Actually a number of us have explained the relationship

you need to change the denominator from 2 to 6 ... what is the relationship there