3 Digit Addition Adding three-digit numbers might seem like a big task, but with some simple steps, you’ll see that it’s just a matter of practice and understanding. Whether you’re solving your first math problems or revisiting the basics, this guide will walk you through 3-digit addition step by step.
What Is 3-Digit Addition?
Three-digit addition involves adding numbers that have three digits, like 243 + 156. Numbers in this range are made up of the hundreds, tens, and ones places. You add these numbers column by column, starting from the right (the ones place), and sometimes you “carry over” extra values into the next column.
Why Learn This?
Understanding 3-digit addition isn’t just about math class. It’s useful in real life for balancing money, measuring things, or even calculating big scores in games! The more comfortably you can add, the easier these everyday tasks will become.
Step-by-Step Guide to Adding Three-Digit Numbers
Let’s break it down with an example:
Problem: 348 + 276
Step 1: Write the Numbers Vertically
To make sure every digit lines up, stack the numbers so that the ones, tens, and hundreds places align with each other. Like this:
348 + 276 ------
Step 2: Start with the Ones Place
Look at the last digit of each number (8 in 348 and 6 in 276). Add them together.
8 + 6 = 14
Since 14 is more than 9, you’ll need to “carry” the extra 10 into the next column, the tens place. Write the 4 below the line in the ones column, and carry the 1 above the tens digits.
1 348 + 276
Now it’s time to add the tens digits. Don’t forget to include the carried-over 1!
4 (from 348) + 7 (from 276) + 1 (carried over) = 12
Again, since 12 is larger than 9, write the 2 below the line in the tens column, and carry the 1 to the hundreds place.
1 348 + 276 ------ 24
Step 4: Add the Hundreds Place
Finally, add the hundreds digits along with any number you’ve carried over.
3 (from 348) + 2 (from 276) + 1 (carried over) = 6
Write this number in the hundreds place below the line.
348 + 276 ------ 624
And there you have it! 348 + 276 = 624.
Tips for Success
- Line It Up – Always write numbers neatly in columns to avoid mixing up places.
- Check Your Work – After solving, quickly add the numbers again to confirm your result.
- Practice Carrying Over – When you’re new, focus on mastering how and when to carry over digits.
- Use Real-Life Examples – Practice problems with relatable examples, like adding prices or scores in a game.
That’s why carrying over is like moving values to the next “level” in the number.
Time to Practice!
Try solving this problem on your own:
Question: 572 + 839
Write it out, follow the steps, and remember to carry over where needed. What answer do you get?
Happy adding! Practice every day, and soon, you’ll be confidently solving even bigger math problems.
