Vertical Addition: Simple addition of 3-digit numbers

To solve this problem, we will perform vertical addition:

• Step 1: Align the numbers by place value:

  $\begin{aligned} &104 \\ + &153 \\ &\underline{\phantom{706}} \\ \end{aligned}$

• Step 2: Add the numbers starting from the rightmost digit (units).
  The units column: $4 + 3 = 7$
• Step 3: Move to the tens column and add.
  The tens column: $0 + 5 = 5$
• Step 4: Finally, add the hundreds column.
  The hundreds column: $1 + 1 = 2$

Putting it all together, the result of adding 104 and 153 is:

$\begin{aligned} &104 \\ + &153 \\ &\underline{257} \\ \end{aligned}$

Therefore, the solution to the problem is $257$.

To solve this problem, we'll perform vertical addition as follows:

• Step 1: Align the numbers by columns (units, tens, hundreds).
  $\begin{aligned} &281 \\ +& \\ &507 \\ \hline \end{aligned}$

• Step 2: Add the digits from the rightmost column to the leftmost:
  - Units place: Add 1 and 7, which equals 8. No carry is needed here.
  - Tens place: Add 8 and 0, which equals 8. No carry is needed here.
  - Hundreds place: Add 2 and 5, which equals 7. No carry is needed here.

Therefore, the sum of $281$ and $507$ is $788$.

The solution to the problem is $788$.

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:

• Units Column: $7 + 1 = 8$
• Tens Column: $6 + 2 = 8$
• Hundreds Column: $3 + 4 = 7$

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

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

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

To solve this vertical addition problem, follow these steps:

• First, write the two numbers vertically, aligning them by their place values:
  $\begin{aligned} &574 \\ +& \\ &313 \\ \end{aligned}$
• Add the digits in the ones column (far right):
  - 4 + 3 = 7
• Proceed to the tens column (middle):
  - 7 + 1 = 8
• Finally, add the digits in the hundreds column (far left):
  - 5 + 3 = 8

Thus, the sum of 574 and 313 is $887$, which matches the correct answer choice.