C1 - Simplifications of Fractions 

C2  -  Additions and subtractions of fractions - Level 1

Fractions with same denominator

C3  -  Additions and subtractions of fractions - Level 2

Addition and subtraction with an integer

C4 -  Additions and subtractions of fractions - Level 3

C5 - Multiplication of a fraction by an integer

Example : $24\times \frac{5}{3}$

C6 - Multiplications of fractions

C7 - Operations with fractions - Level 1

Example: $\frac{5}{2}:\frac{4}{7}$

C8 - Operations with fractions - Level 2

Example : $\frac{1}{4}\left(\frac{2}{3}+\frac{2}{5}\right)$

C9 - Operations with fractions - Level 3  

Examples : $\frac{\frac{1}{4}+\frac{1}{2}}{\frac{2}{3}}+\frac{2}{5}$ ; $\left(\frac{1}{4}-\frac{2}{3}\right)\left(\frac{2}{3}+\frac{2}{5}\right)$

C10 - Operations with fractions - Level 4