Answer these fraction questions PLEASE!

These are easy UNLIKE fraction questions that i don't understand.. i have to do these by tomorrow and help would be great..
1/6 + 1/2 = ... + ... = ... ?
1/3 + 4/9 = ... + ... = ... ?
11/15 - 3/5 = ... - ... = ... ?
9/10 + 19/40 = = ... + ... = ... ? in this one there needs to be a whole one i believe..
3/8 + 7/12 = ... + ... = ... ?
1/5 + 3/8 = ... + ... = ... ?
7/10 - 1/15 = ... - ... = ... ?
6/7 - 1/5 = ... - ... = ... ?

Okay so...
1/6 +1/2 = 1/6 + 3/6 = 4/6 = 2/3
1/3 +4/9 = 3/9 + 4/9 = 7/9
11/15 - 3/5 = 11/15 - 9/15 = 2/15
9/10 + 19/40 = 36/40 + 19/40 = 55/40 = 1 15/40 = 1 3/8
3/8 + 7/12 = 9/24 + 14/24 = 23/24
1/5 + 3/8 = 8/40 + 15/40 = 23/40
7/10 - 1/15 = 21/30 - 2/30 = 19/30
6/7 - 1/5 = 30/35 - 7/35 = 23/35
there done...

When adding or subtracting fractions make sure the denominator is the same.

I would arrange the fractions vertically. I'd have 1 over 6 plus 1 over 2.

The least common multiples of the denominators are 2 (because 2 is divisible by itself and is divisible by 6 evenly.)

2 becomes the new denominator for two new fractions.

Then, 2 divides into the new denominator, and multiplies to the numerator to get your "new" numerator.

On the second fraction, make sure your new denominator is still 2, and then divide the new denominator by the old denominator. You get 3, (because 2 divided by 6 is 3) and then you multiple the 3 to the old numerator, to get your new numerator. Since your denominators are now the same, you can add or subtract the numerators. Keep the denominator the same. Simplify if needed.

Your answer should look something like this:

2 over 2

plus

3 over 2

5 over 2.

There is a crisscross method to adding and subtracting fractions.
Lets take the first example:
1/6 + 1/2=?