Add fractions in seconds

Having a nightmare with fraction manipulation, here is an easy and natural solution for doing it.

Let us take,

3          4

---  +   ----    =       Multiply Crosswise and add  ( 3 X 6 = 18  and 5 X 4 = 20,

5           6                                                               that makes 18 + 20 = 38).

( In Maths terms   Multiply Left Numerator By Right Denominator and vice verse)

So Top of the answer is : 38 (Numerator)

For calculating bottom of the answer simply multiply both the numbers in bottom (5 X 6= 30). (Denominator)

So the answer is 38

                           ------

                            30.

If you want to subtract ? instead of adding both numbers to figure out the top of the answer (Numerator), just subtract.

Isn't simple enough ?