Try these skills in Khan to prepare.

number line

Fractions on the number line

Unit fractions on the number line

Finding 1 on the number line

add and subtract fractions

adding fractions with unlike denominators

subtracting fractions with unlike denominators

adding and subtracting negative fractions

multiply fractions

visually understanding multiplying fractions by whole numbers

understanding multiplying fractions by fractions

multiplying fractions

Multiplying positive and negative fractions

Multiplying mixed numbers

divide fractions

dividing fractions