Question

find each sum or difference.

5/6 +7/9

Answer 1

1 and 11/18ths

Answer 2

5/6 7/9

To answer these questions you need to have the bottom number equal.
To do that you find the lowest common denominator. The lowest number both of these have in common.
So think of factors of 9:
9x1=9
9x2=18
9x3=27
And factors of 6:
6x1=6
6x2=12
6x3=18

And you see we have a match. Both 9 and 6 have 18 in common.

So now we create new fractions using 18 as the denominator.

Let's look at 5/6
To get 6 to 18 we have to multiply by 3 as we see above. So we also multiply 5 by 3.
The new fraction then becomes 15/18

Let's look at 7/9
To get 9 to 18 we multiply by 2. So we also multiply 7 by 2.
The new fraction then becomes 14/18.

So the new problem is now:
15/18 + 14/18

Now you solve with simple addition.

Answer 3

dont under stand