Solve Vertical Addition: 43 + 9 Step-by-Step

To solve the vertical addition problem, we'll proceed through the following steps:

• Step 1: Align the numbers by place value: tens and ones.
  Given: $\begin{aligned} &43 \\ +& \\ &~9 \\ \end{aligned}$
• Step 2: Add the ones column:
  Add $3$ (from $43$) and $9$. The sum is $12$. Because $12$ is greater than $9$, we need to carry over:
• Write down the $2$ in the ones place.
• Carry over the $1$ to the tens column.
• Step 3: Add the tens column:
  Add the $4$ (from the tens place of $43$) and the carried over $1$, the sum is $5$.
• The tens column now becomes $5$.
• Step 4: Assemble the result:
  The result is the tens value $5$ and the ones value $2$, making the final answer $52$.

Therefore, the solution to the problem is $52$.