Add and Subtract Fractions with Different Denominators

EXAMPLE 4.67

Add: $\dfrac{1}{2}+\dfrac{1}{3}$.

EXAMPLE 4.68

Subtract: $\dfrac{1}{2}-\left(-\dfrac{1}{4}\right)$.

EXAMPLE 4.69

Add: $\dfrac{7}{12}+\dfrac{5}{18}$

EXAMPLE 4.70

Subtract: $\dfrac{7}{15}-\dfrac{19}{24}$.

EXAMPLE 4.71

EXAMPLE 4.72

Add: $\dfrac{3}{5}+\dfrac{x}{8}$.