Solve Vertical Addition: 631 + 9 Step by Step

Video Solution

Solution Steps

00:00 Solve

00:03 Each time consider combining 2 digits, and then place

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

00:09 Place the ones in ones, add 1 to tens

00:12 Place 0 in the missing digits

00:16 Combine the tens, remember to add 1, and place in tens

00:19 Place 0 in the missing digits

00:23 Combine the hundreds, and place in hundreds

00:27 And this is the solution to the question

Step-by-Step Solution

To solve this problem, we'll perform vertical addition for the numbers 631 and 9, handling any necessary carrying.

Align the numbers based on their place value:

$\begin{aligned} &631 \\ +& \\ &~~~9 \\ \end{aligned}$

Step 1: Add the units place (rightmost column).
- We have 1 (from 631) + 9 = 10.
- Write 0 and carry over 1 to the tens place.
Step 2: Add the tens place (second column from the right).
- We have 3 (from 31) + 0 + 1 (carry-over) = 4.
- Write 4 in the tens place.
Step 3: Add the hundreds place (leftmost column).
- We have 6 only (as there’s nothing else to add).
- Write 6 in the hundreds place.

Thus, the final sum of 631 and 9 is 640.

Therefore, the solution to the problem is $\textbf{640}$ .