Operations with fractions are not easy the way you may think they are, believe me it can be challenging sometimes if you are not prepared. Take time to learn the followings:

Addition of fractions (Like and unlike Denominators)

Subtraction of Fractions ( Like and Unlike Denominators)

Adding or Subtracting of Fractions and Mixed Numbers (Like Denominators)

Addition or Subtraction of Fractions and Mixed Numbers (Unlike Denominators)

Multiplication of Mixed Numbers

Multiplication of Fraction and Mixed Numbers