adding - first make a common denominator (bottom number), and then add the tops together.  \nsubtract - see above, only subtract.\nmultiply - multiply the numerators (tops) by each other for a new numerator, and multiply the denominators by each other for a new one.\ndivide - invert the 2nd fraction (if it was 3 over 6, now make it 6 over 3), and then multiply.\n\ngood luck!