Solve Three-Digit Addition: 115 + 236 Using Vertical Format

Video Solution

Solution Steps

00:00 Solve

00:03 Each time we'll calculate the sum of 2 digits, and then substitute

00:06 Let's start by adding ones with ones

00:09 Substitute the ones, add 1 to the tens

00:14 Add tens with tens, remember to add 1 to the calculation

00:20 Substitute in the tens place

00:24 Add hundreds with hundreds, and substitute in the hundreds place

00:28 And this is the solution to the question

Step-by-Step Solution

To solve this problem, we'll use the following steps:

$\begin{aligned} &115 \\ +&236 \\ &\underline{\phantom{776}} \\ \end{aligned}$

Step 2: Start by adding the digits in the units (right-most) column:
$5 + 6 = 11$
Write 1 in the units place and carry over 1 to the tens column.

Step 3: Add the digits in the tens column with the carry:
$1 + 3 + 1 = 5$
Write 5 in the tens place.

Step 4: Add the digits in the hundreds column:
$1 + 2 = 3$
Write 3 in the hundreds place.

Putting it all together, we have:
$\begin{aligned} &115 \\ +&236 \\ &\underline{351} \\ \end{aligned}$

Therefore, the sum of 115 and 236 is $\textbf{351}$ . The correct choice is option 3.