Three-Digit Addition: Solve 664 + 227 in Vertical Format

Question

$\begin{aligned} &664 \\ +& \\ &227 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

00:00 Solve

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

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

00:09 We'll substitute the ones, add 1 to the tens

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

00:18 Substitute in the tens place

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

00:30 And this is the solution to the question

To solve this problem using vertical addition, we follow these steps:

Step 1: Add the digits in the ones column:
The ones digits are $4 + 7 = 11$ . We write down the 1 and carry over the other 1 to the tens column.
Step 2: Add the digits in the tens column, including the carry:
The tens digits are $6 + 2 = 8$ , plus the carry of $1$ makes $9$ . We write down the 9.
Step 3: Add the digits in the hundreds column:
The hundreds digits are $6 + 2 = 8$ . No carry from the previous column this time. We write down the 8.

Therefore, combining these, the final result of adding 664 and 227 is $891$ .

The correct choice from the multiple-choice options is $891$ .

891