Solve Three-Digit Addition: 367 + 421 in Vertical Format

Question

$\begin{aligned} &367 \\ +& \\ &421 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

00:00 Solve

00:03 Each time calculate the sum of 2 digits, and then write down

00:06 Let's start by adding ones with ones, and write in the ones place

00:08 Add tens with tens, write in the tens place

00:12 Add hundreds with hundreds, write in the hundreds place

00:16 And this is the solution to the question

To solve this addition problem, we will apply vertical addition:

We start with the given problem:

$\begin{aligned} &367 \\ +& \\ &421 \\ \end{aligned}$

We perform the addition column by column:

Putting it all together, the sum of the two numbers is:

$\begin{aligned} &788 \end{aligned}$

Therefore, the solution to the problem is $788$ .

788