#1**+1 **

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.

Nirvana Dec 1, 2019

#2**+2 **

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.

Melody Dec 1, 2019

#3**+1 **

I've noticed in this problem there is a person icon in the corner...

What's that about?

tommarvoloriddle Dec 1, 2019

#4**0 **

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.

Melody
Dec 1, 2019

#6**+1 **

Maybe Guest is referring to this:

\(\sum\limits_{k=1}^{n}k\ =\ \frac{n(n+1)}{2}\)

in which case, the following might help:

hectictar Dec 1, 2019

#8**+1 **

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.

Guest Dec 1, 2019

#9**+2 **

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

Guest Dec 1, 2019