Question```latex \begin{align*} 4652 + 9578 + 878 &= 15108 \\ 43427 + 2945 &= 46372 \\ 3079 + 5609 &= 8688 \\ \end{align*}

Studdy Solution
Verify the third addition problem: $3079 + 5609 = 8688$.
1. Align the numbers by place value: $ \begin{array}{c} 3079 \\ 5609 \\ \hline 8688 \\ \end{array} \]
2. Start adding from the rightmost column (units): - $9 + 9 = 18$. Write $8$, carry over $1$.
3. Move to the tens column: - $7 + 0 + 1 = 8$. Write $8$.
4. Move to the hundreds column: - $0 + 6 = 6$. Write $6$.
5. Move to the thousands column: - $3 + 5 = 8$. Write $8$.
6. The sum is $8688$, which matches the given result.
All three addition problems are verified to be correct.