Solve Three-Digit Addition: 157 + 264 in Vertical Format

Video Solution

Solution Steps

00:00 Solve

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

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

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

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

00:19 Place tens in tens, add 1 to hundreds

00:25 Combine hundreds with hundreds, remember to add 1

00:30 Place in hundreds

00:33 And this is the solution to the question

Step-by-Step Solution

To solve this problem, we'll perform vertical addition:

Write the numbers 157 and 264 in a column, aligning the digits by place value. Start from right (units) to left (hundreds).
Step 1: Add the digits in the units place $7 + 4 = 11$ . Write down 1 and carry over 1 to the tens column.
Step 2: Add the digits in the tens place $5 + 6 = 11$ , plus the carried 1 from the previous step, giving a total of 12. Write down 2 and carry over 1 to the hundreds column.
Step 3: Add the digits in the hundreds place $1 + 2 = 3$ , plus the carried 1 from the previous step, resulting in 4. Write down 4.

After adding each column and managing the carries appropriately, the resulting sum of these numbers is 421.

Therefore, the solution to the problem is $421$ .