Question

7/12 + (-5/15)

Answer 1

Find a common denominator.

Answer 2

I don't know :L

Answer 3

\(x|\underline{12~~~~15}\)
Find a number that divides into both evenly. It doesn't have to be the largest, so just pick one.

Answer 4

When the only common factor left is 1, then the common denominator will be the numbers on the left and bottom multiplied together.

Answer 5

3x4=12 3x5=15?

Answer 6

Yes. Those statements are true.

Answer 7

what does that tell you about your common denominator?

Answer 8

its 3?

Answer 9

o.o

Answer 10

Set it up the way I described, and do the multiplication. It is the easiest method I have seen.