Calculate the Sum: 857 + 23 in Vertical Format

Question

$\begin{aligned} &857 \\ +& \\ &~~23 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

00:00 Solve

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

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

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

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

00:19 Place in the tens

00:22 Place 0 in the missing digits

00:25 Add hundreds with hundreds, place in hundreds

00:28 And this is the solution to the question

To solve this problem, we'll use vertical addition step-by-step:

Step 1: Write the numbers 857 and 23 in a column aligned by place values.
Step 2: Add starting from the rightmost column (units), moving left:
- Units: 7 + 3 = 10. Write 0 and carry over 1 to the tens place.
- Tens: 5 + 2 + 1 (carried over) = 8. Write 8 with no carry-over.
- Hundreds: 8 + 0 = 8. Write 8.
Step 3: The final sum is 880.

Therefore, the sum of 857 and 23 is $880$ .

The correct choice is Choice 4: $880$ .

880