Solve the Fraction Equation: Finding the Missing Addend in 1/5 + ? = 3/5

To find the missing fraction $x$ in the equation $\frac{1}{5} + x = \frac{3}{5}$, we can follow these steps:

• Step 1: Start with the given equation: $\frac{1}{5} + x = \frac{3}{5}$.
• Step 2: Subtract $\frac{1}{5}$ from both sides to solve for $x$:

$x = \frac{3}{5} - \frac{1}{5}$

• Step 3: Since the fractions have the same denominator, subtract the numerators directly:

$x = \frac{3 - 1}{5} = \frac{2}{5}$

Thus, the missing fraction is $\frac{2}{5}$.

Therefore, the solution to the problem is $\frac{2}{5}$.