How to Add Two-Digit and Three-Digit Numbers
Let's break down the process of adding a two-digit number to a three-digit number. For example, let's add the numbers 56 (two-digit) and 123 (three-digit).
Step 1: Write the Numbers Vertically
Write the two numbers one under the other, aligning them by place value (units, tens, hundreds).
123 + 56
Step 2: Add the Units Place
Start with the rightmost column (units place). In our example, we add 3 (from 123) and 6 (from 56):
123
+ 56
-----
9 (3 + 6 = 9)
Step 3: Add the Tens Place
Now move to the next column (tens place). We add 2 (from 123) and 5 (from 56):
123
+ 56
-----
79 (2 + 5 = 7)
Step 4: Add the Hundreds Place
Finally, we move to the hundreds place. Since there is only 1 (from 123) in the hundreds place, we just add it:
123 + 56 ----- 179 (1 + 0 = 1, since there is no hundreds digit in 56)
Step 5: Combine All the Results
Now we can write down the total from all columns:
123 + 56 ----- 179
Final Answer
So, 56 + 123 = 179.
Practice Example
Try adding 34 and 256 using the same steps!
Follow these steps one by one, and you'll become great at adding two-digit and three-digit numbers!