Question

Adding fractions, help?

Answer 1

The problem is -2/15 + 5/6

Answer 2

To add fractions, you simply must find the common denominators for the denominators. Once you find the LCD, you can multiply your fractions with your new LCD.

Answer 3

Here's my work:
5/6 - 2/15
Common Denominator: 30
5/6 * 5/5= 25/30
2/15 * 2/2= 4/30
25/30 + 4/30 = 29/30
= - 29/30

Answer 4

What have I done wrong?

Answer 5

Here's my work:
5/6 + 2/15 ****
Common Denominator: 30
5/6 * 5/5= 25/30
2/15 * 2/2= 4/30
25/30 + 4/30 = 29/30
= - 29/30

Answer 6

Sorry, messed up there!

Answer 7

Since when does 29/30 = -29/30 ?

Answer 8

It's rights

Answer 9

You did it right

Answer 10

Because I was told when adding a positive fraction to a negative one, find the answer and at the end add a negative sign in front of it.

Answer 11

Good for you!:)

Answer 12

Is that not true?

Answer 13

Well true

Answer 14

So @YoshinTown and @Ashja how come it is not

25/30 - 4/30

?

Answer 15

I guess it's right. Sorry if I'm not that much help. I haven't done math all summer! I calculated myself and got the same answer as you ! It should be correct!

Answer 16

You can't switch the fractions around hero

Answer 17

Yup my brain just exploded, someone please explain

Answer 18

@YoshinTown, whatever you calculated, it isn't correct. I wish you would cease talking for a minute so that I can help @Ashja

Answer 19

Oh sorry...

Answer 20

If you had something like

-2 + 5

Couldn't you re-write it is 5 - 2 ?
If so, why wouldn't you be able to do it with fractions?

Answer 21

Actually th e answer is wrong.
When your at -4/30+25/30, the -4 and 25 are like integers

Answer 22

So then it would be 21/30

Answer 23

Now you're just giving answers.

Answer 24

But don't forget that you have to reduce so then your answer will be 7/10

Answer 25

@YoshinTown, you are being very rude.

Answer 26

I'm just explaining

Answer 27

You didn't explain anything.

Answer 28

Why?:(

Answer 29

Some people do this in openstudy

Answer 30

Well you didn't explain that much! Your being kinda rude

Answer 31

I feel sad

Answer 32

Sorry

Answer 33

That's because I was too busy trying dealing with you to help anyone. You kept telling me that what I was saying was wrong.

Clearly

\[\frac{5}{6} - \frac{2}{15} = \frac{25}{30} - \frac{4}{30} = \frac{21}{30} = \frac{7}{10}\]

And yes, addition of fractions are commutative.

Answer 34

I didn't mean to say that

Answer 35

I didn't mean your answer was wrong, I meant mines or the girl who needed help