How to add and subtract fractions

How to add and subtract fractions

If it is the same denominator fraction addition and subtraction, the denominator remains unchanged, and the molecular phase addition and subtraction (7 / 5-14 / 5 = (7-14) / 5 = - 7 / 5)
If the denominator is not changed, the numerator will be added and subtracted; if it is a different denominator fraction, the different denominator fraction will be converted into the same denominator fraction, (1 / 2 + 1 / 3 = 3 / 6 + 2 / 6 = 5 / 6) and then the same denominator fraction will be added and subtracted. The final result will be reduced to the simplest fraction