Solve Vertical Addition: 23 + 7 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 adding ones with ones

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

00:12 Remember 1 carried over

00:15 Place 0 where there is no digit

00:18 Add tens with tens, remember to add 1

00:22 Place the solution in the tens

00:25 And this is the solution to the problem

Step-by-Step Solution

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

Step 1: Write the numbers in a column, aligning them by the right:
$\begin{array}{c} 23 \\ + 7 \\ \hline \end{array}$
Step 2: Add the digits in the rightmost column (ones place):
The digits are 3 and 7. So, $3 + 7 = 10$ . Write 0 in the ones place and carry over 1 to the tens place.
$\begin{array}{c} 23 \\ + 7 \\ \hline ~~~ 0 \end{array}$
Step 3: Add the digits in the tens place:
The digits are 2 and, due to the carry, 1. So, $2 + 1 = 3$ . Write 3 in the tens place.
$\begin{array}{c} 1~~ \\ 23 \\ + 7~ \\ \hline 30 \end{array}$

Therefore, the sum of 23 and 7 is $30$ .