Solve 1/9 + 2/9: Adding Fractions with Same Denominator

To solve the problem of adding the fractions $\frac{1}{9}$ and $\frac{2}{9}$, we proceed with the following steps:

• Step 1: Verify that the fractions have the same denominator.
  Both fractions, $\frac{1}{9}$ and $\frac{2}{9}$, have a common denominator of 9.
• Step 2: Add the numerators.
  The numerators are 1 and 2, respectively. So, $1 + 2 = 3$.
• Step 3: Write the result over the common denominator.
  This gives us the fraction $\frac{3}{9}$.
• Step 4: Simplify the fraction if possible.
  The fraction $\frac{3}{9}$ can be simplified by dividing the numerator and the denominator by their greatest common divisor, which is 3: $\frac{3}{9} = \frac{3 \div 3}{9 \div 3} = \frac{1}{3}$

Therefore, the solution to the problem is $\frac{1}{3}$.