Solve Decimal Addition: 20.2 + 8.8

To solve this problem, we will add the decimal numbers 20.2 and 8.8. Here is how we proceed:

• Step 1: Align the decimal numbers:

•           $\phantom{1}20.2$
  $+$ $\phantom{1}8.8$
            $\overline{\phantom{99.99}}$
  

• Step 2: Add column by column, starting from the right.

  • First, add the tenths: $2 + 8 = 10$. Since 10 is more than 9, write 0 and carry over 1 to the units column.

  • Then, add the units: $0 + 8 = 8$, plus the carry-over 1 makes it 9.

  • Finally, add the tens: $20 + 0 = 20$.

• When combining the results, we get:

            $29$.
  

  Therefore, the sum of $20.2$ and $8.8$ is \( \textbf{$29$} \).