Could I have the choices?
The reason fractions need a common denominator before adding or subtracting is so that the numbers of pieces you are adding/subtracting are all the same size. Note that the numerator of a fraction just tells you how many pieces you have of that size.
2 + 2 = 4 5 + 5 = 10 + 4 = 14 your answer is 14
Step-by-step explanation: