Guys I need help adding fractions

[K.I.L.E.R]

How do I add and take away fractions?
This is very difficult and I need help.
Thanks.

 

[PARANOiA]

Make the denominators equal, then add or subtract the numerator.

 

[K.I.L.E.R]

That would be the bottom right?

3 5
_ + _
2 6

=

3+5
_
6

=

8/6?

 

[nutball]

Nope, 3/2 = 9/6 ... then 9/6 + 5/6 = 14/6

Anyway, isn't this kids stuff? Like ... 10 year old kids know this stuff, don't they?

 

[K.I.L.E.R]

How did you get 9/6?
Where did you pull 9 from?

 

[nutball]

Multiply 3/2 by 3 top and bottom ie. 3/3 (= 1), gives you 9/6.

Basically it's a mathematical convenience, you're multiplying a number by 1 but in doing so you make the denominator the same as your other fraction you're wanting to add to.

 

[London Geezer]

KILER, aren't you studying programming?! How can you not know how to calculate this stuff? It's elementary.

3/2 + 5/6 = 9/6 + 5/6

because you neeed to get the lowest common denominator between the two fractions, which is 6.
If you turn 3/2 into a fraction with 6 as a denominator, you need to multiply the 2 by 3 so you get 6 at the bottom, but you also have to multiply the top by 3, so you get 9 at the top (you can't just multiply the bottom by a number without affecting the top of the fraction too)

After that it's easy, you just add 9 + 5 which is 14. So the result is 14/6

 

[rabidrabbit]

Kids today, I wouldn't be surprised they're not taught fractions, just decimals.
Really, this is something so elementary that even I who is really no maths genius have known this for.... 30 years at least!
Unless this is some K.I.L.E.R universe maths where this world rules don't apply.......

 

[Gubbi]

Kids today, I wouldn't be surprised they're not taught fractions, just decimals.
Really, this is something so elementary that even I who is really no maths genius have known this for.... 30 years at least!
Unless this is some K.I.L.E.R universe maths where this world rules don't apply.......

My brother teaches math, and kids are taught fractions today.

Cheers

 

[Captain Chickenpants]

Changing education systems can leave some strange educational gaps. I never covered long division until I had to do it in binary.

CC

 

[K.I.L.E.R]

Sorry this is a bit difficult.
I'll do it after Ghost in the Shell SAC.

 

[K.I.L.E.R]

I DID IT!!!

4/7 + 9/3

7 and 3 go into 21 only together.

so

a/21

7 goes into 21 3 times.

4*3
---
21

12/21 + 9/21

?

 

[nintenho]

K.I.L.E.R., you didn't choose your tag did you?

 

[Captain Chickenpants]

I DID IT!!!

4/7 + 9/3

7 and 3 go into 21 only together.

so

a/21

7 goes into 21 3 times.

4*3
---
21

12/21 + 9/21

?

Wrong.


You need to multiply 4/7 by 3/3 giving 12/21, and 9/3 by 7/7 giving 63/21. You can then add 12/21 and 63/21 to give 75/21

CC

 

[K.I.L.E.R]

Let me do another:

8/6+ 5/4

16/12 + 15/12

Right?

 

[London Geezer]

Let me do another:

8/6+ 5/4

16/12 + 15/12

Right?

yep

 

[K.I.L.E.R]

Thanks guys.
It's just that this kind of maths is really difficult.

I'm okay at calculus though I just needed to fix that issue.

 

[London Geezer]

Fractions are superfun!!

 

[Diplo]

KILER, aren't you studying programming?!

That's the whole point of being a programmer - you don't do the calculations, the computer does

 

[K.I.L.E.R]

Algebraically you do this:

a/b + c/d

a+c/bd?