Solve Vertical Addition: 423 + 55 Step-by-Step

Question

$\begin{aligned} &423 \\ +& \\ &~~55 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

00:00 Solve

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

00:06 Let's start by combining ones with ones, place in ones

00:09 Combine tens with tens, place in tens

00:12 Place 0 in the missing digits

00:16 Combine hundreds with hundreds, place in hundreds

00:19 And this is the solution to the question

To solve this addition problem, follow these steps:

Step 1: Add the digits in the units place: $3 + 5 = 8$ . Write down 8 in the units place.
Step 2: Add the digits in the tens place: $2 + 5 = 7$ . Write down 7 in the tens place. No carrying is needed.
Step 3: Add the digits in the hundreds place: $4 + 0 = 4$ . Write down 4 in the hundreds place.

After performing these steps, the final sum is:

$\begin{aligned} &423 \\ +& \\ &~~55 \\ \hline &478 \\ \end{aligned}$

Therefore, the sum of 423 and 55 is $478$ .

478