+701 you divide by 2 because the 2 is in your denominator therefore it is a fraction......
for example 5 divided by 2 could also be seen as 5 TIMES 1/2 :)
hope this helps in some way.
+118687 Good question guest and thanks for your answer Nivana,
I'm going to answer the same, just with slightly different words.
A fraction line, which is shown as / here, is exactly the same thing as a divide by sign.
For instance.
\(\frac{9}{2}=4\frac{1}{2}\\ 9\div 2 = 4\frac{1}{2}\\\)
See how the divide by sign looks like a fraction, only it has dots top and bottom instead of numbers?
Well, that is no coincidence.
+1713 I've noticed in this problem there is a person icon in the corner...
What's that about?
+118687 Hi Tom,
I really don't know. I don't remember seeing that symbol before.
I think it has been labelled as a high priority question. Maybe it is advertised in FaceBook or somewhere else.
It is bordered top an bottom by a heavy line in the question list.
GingerAle is the one most likely to be able to answer your question.
+9481 Maybe Guest is referring to this:
\(\sum\limits_{k=1}^{n}k\ =\ \frac{n(n+1)}{2}\)
in which case, the following might help:
I believe hectictar is right!. I think he/she means that when you are summing up a sequence of numbers, say from 1 to 10, why do you do this: [10 x (10+1)] / 2 = 55.
omg hecticar the 1+6 2+5 3+4 etc explanation
nobody ever showed it to me that way before
it's so obvious now ... i'm so happy i'm crying
