3 Digit Addition Worksheets
Welcome to our 3 Digit Addition Worksheets page.
Here you will find a wide range of free printable Second Grade Addition Worksheets, which will help your child learn to add numbers with up to 3 digits.
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3 Digit Addition Worksheets
This page contains a range of resources to help you learn and practice your 3-digit addition skills.
We have several worked examples so you can see how to work out different additions step-by-step.
We also have a range of worksheets suitable for different levels of ability.
Using our resources will help your child to:
- understand how to do 3-digit addition
- add 3-digit numbers with multi-addends
- set out an addition problem correctly.
How to do 3 Digit Addition
How to do 3-Digit Addition
Step 1) Add the Ones digit of both numbers together.
- Write the number of Ones below the line in the Ones place.
- If the total of the two digits is 10 or more, then regroup the 10 Ones into 1 Ten and move it into the Tens column.
We add the Ones: 5 + 8 = 13 Ones.
We regroup the 13 Ones into 1 Ten and 3 Ones.
We carry over 1 Ten and move it to the top of the Tens column.
We write a 3 under the line in the Ones place.
Step 2) Add the Tens digit of both numbers together, remember to add any Tens that were carried over.
- Write the number of Tens below the line in the Tens place.
- If the total of the two digits is 10 or more, then regroup the 10 Tens into 1 Hundred and move it into the Hundreds column.
We add the Tens, including the Ten we carried over: 1 + 2 + 1 = 4 Tens.
We write this number under the line in the Tens place.
Step 3) Add the Hundreds digit of both numbers together, remember to add any Hundreds that were carried over.
- Write the number of Hundreds below the line in the Hundreds place.
- If the total of the two digits is 10 or more, then regroup the 10 Hundreds into 1 Thousand and write it into the Thousands place.
We add the Hundreds: 6 + 4 = 10 Hundreds.
We regroup the 10 Hundreds into 1 Thousand and 0 Hundreds.
As there are no further digits to add up, we write the 1 in the Thousands place and a 0 in the Hundreds place.
3 Digit Addition Worked Examples
Example 1) Work out 247 + 132.
This example does not need any regrouping.
Step 1) Add the Ones digit of both numbers together.
Adding the Ones gives us: 7 + 2 = 9 Ones. We write this below the line in the Ones place.
Step 2) Add the Tens digit of both numbers together, remember to add any Tens that were carried over.
Adding the Tens gives us: 4 + 3 = 7 Tens. We write this below the line in the Tens place.
Step 3) Add the Hundreds digit of both numbers together, remember to add any Hundreds that were carried over.
Adding the Hundreds gives us: 2 + 1 = 3 Hundreds. We write this below the line in the Hundreds place.
This gives us a final answer of 247 + 132 = 379
Example 2) Work out 506 + 248.
Step 1) Add the Ones digit of both numbers together.
- If the total of the two digits is 10 or more, then regroup the 10 Ones into 1 Ten and move it into the Tens column.
Adding the Ones gives us: 6 + 8 = 14 Ones = 1 Ten + 4 Ones. Write the 4 Ones below the line in the Ones place. Carry over the 1 Ten into the Tens column.
Step 2) Add the Tens digit of both numbers together, remember to add any Tens that were carried over.
Adding the Tens gives us: 1 + 0 + 4 = 5 Tens. We write this below the line in the Tens place
Step 3) Add the Hundreds digit of both numbers together, remember to add any Hundreds that were carried over.
Adding the Hundreds gives us: 5 + 2 = 7 Hundreds. We write this below the line in the Hundreds place.
This gives us a final answer of 506 + 248 = 754
Example 3) Work out 482 + 176.
Step 1) Add the Ones digit of both numbers together.
Adding the Ones gives us: 2 + 6 = 8 Ones. We write this below the line in the Ones place.
Step 2) Add the Tens digit of both numbers together, remember to add any Tens that were carried over.
Adding the Tens gives us: 8 + 7 = 15 Tens = 1 Hundred + 5 Tens. We write 5 Tens below the line in the Tens place. We carry 1 Hundred into the Hundreds column.
Step 3) Add the Hundreds digit of both numbers together, remember to add any Hundreds that were carried over.
Adding the Hundreds gives us: 1 + 4 + 1 = 6 Hundreds . We write this below the line in the Hundreds place.
This gives us a final answer of 482 + 176 = 658
Example 4) Work out 974 + 389
Step 1) Add the Ones digit of both numbers together.
Adding the Ones gives us: 4 + 9 = 13 Ones = 1 Ten + 3 Ones. We write 3 Ones below the line in the Ones place and carry over 1 Ten into the Tens column.
Step 2) Add the Tens digit of both numbers together, remember to add any Tens that were carried over.
Adding the Tens gives us: 1 + 7 + 8 = 16 Tens = 1 Hundred + 6 Tens. We write 6 Tens below the line in the Tens place. We carry 1 Hundred into the Hundreds column.
Step 3) Add the Hundreds digit of both numbers together, remember to add any Hundreds that were carried over.
Adding the Hundreds gives us: 1 + 9 + 3 = 13 Hundreds = 1 Thousand + 3 Hundreds .
We write 1 in the Thousands place and 3 in the Hundreds place.
This gives us a final answer of 974 + 389 = 1363
Example 5) Work out 728 + 457 + 66
Step 1) Add the Ones digit of the 3 numbers together.
Adding the Ones gives us: 8 + 7 + 6 = 21 Ones = 2 Tens + 1 One. We write 1 One below the line in the Ones place and carry over 2 Tens into the Tens column.
Step 2) Add the Tens digit of the 3 numbers together, remember to add any Tens that were carried over.
Adding the Tens gives us: 2 + 2 + 5 + 8 = 17 Tens = 1 Hundred + 7 Tens. We write 7 Tens below the line in the Tens place. We carry 1 Hundred into the Hundreds column.
Step 3) Add the Hundreds digit of the 3 numbers together, remember to add any Hundreds that were carried over.
Adding the Hundreds gives us: 1 + 7 + 4 = 12 Hundreds = 1 Thousand + 2 Hundreds.
We write 1 in the Thousands place and 2 in the Hundreds place.
This gives us a final answer of 728 + 457 + 86 = 1271
3 Digit Addition Worksheets
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We have split the sheets into 4 sections.
- The first section is the easiest and involves 3-digit addition with no regrouping
- The second section involves 3-digit addition with regrouping.
- The third section involves 3-digit addition with multi-addends
- The final section involves 3-digit addition challenges.
3 Digit Addition With No Regrouping
The sheets in this section are all of a similar level of difficulty.
3 Digit Addition With Regrouping
Sheet 1 - regrouping in ones only
Sheet 2 - regrouping in ones or tens
Sheet 3 & 4 - regrouping in ones and/or tens
Sheets 5 & 6 - regrouping in ones/tens/hundreds
Sheets 7 & 8 - setting out and solving addition problems (regrouping in ones/tens/hundreds)
3 Digit Addition With Multi-Addends
Sheet 1 - regrouping in ones/tens all answers below 1000
Sheet 2 - regrouping in ones/tens/hundreds
3-Digit Addition Missing Number Challenges
These sheets involve filling in the missing digits in the 3-digit additions, where the digits may belong to the addends or the answer.
Looking for some easier addition worksheets
As well as 3-digit addition worksheets, we also have 2-digit addition worksheets.
The sheets are similar to those on this page, but with smaller numbers.
Looking for some harder addition worksheets
We also have a selection of 4-digt addition worksheets and worksheets involving adding much larger numbers.
More Recommended Math Worksheets
Take a look at some more of our worksheets similar to these.
3 Digit Subtraction (& Addition) Worksheets
Column Addition Worksheet Generator
If you need some more 3 digit addition worksheets, or want to practice more column addition with regrouping, then take a look at our column addition worksheet generator.
You can select the size of numbers and number of questions you want, then create your worksheet in a matter of seconds.
More Second Grade Addition Worksheets
Here you will find a range of Free Printable Second Grade Addition Worksheets.
The following worksheets involve using the Second Grade Math skills of adding numbers, and solving addition problems.
Using these sheets will help your child to:
- learn their addition facts to 20+20
- learn how to solve addition sums where one of the addends is missing, but the total is given;
- learn to add numbers to 1000 in columns.
2nd Grade Money Worksheets
Here you will find a range of free printable Second Grade Money Worksheets.
The following worksheets involve counting different amounts of money in pennies, nickels, dimes and quarters.
There is a wider range of free money worksheets at the 2nd Grade Math Salamanders (see below). These sheets will open in a new tab.
Using these sheets will help your child to:
- learn the names and values of the US coins;
- learn to count up different amounts of money to $1 in coins.
- learn to count up to $10 in coins and dollar bills.
All the free Second Grade Math Worksheets in this section are informed by the Elementary Math Benchmarks for 2nd Grade.
Money Worksheets
Math Addition Games
Here you will find a range of Free Printable Addition Games to help kids learn their addition facts.
Using these games will help your child to learn their addition facts, and also to develop their memory and strategic thinking skills.
Second Grade Math Word Problems
Here are a range of problems solving sheets for 2nd graders. Most of the sheets contain 'real-life' problems related to animal facts.
Using the sheets will help your child to:
- apply their addition, subtraction, and multiplication skills;
- apply their knowledge of rounding and place value;
- solve a range of 'real life' problems.
All the 2nd grade sheets in this section support Elementary math benchmarks.
These sheets involve solving one or two more challenging longer problems. This link opens in a new tab.
These sheets involve solving many 'real-life' problems involving data.
These sheets involve solving a range of multiplciation problems.
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