2nd Grade Math · Adding and Subtracting Within 100
Addition without regrouping Worksheets
Free and printable, with a full answer key. Every worksheet is generated fresh, so you can hand a different version to every student.
Two-digit sums where no column reaches 10, such as 34 + 25.
Or start with a ready-made version:
How it works: a quick refresher
For the adult at the table. These are the rules the worksheet practices, followed by one problem worked from start to finish.
| Strategy | How it works |
|---|---|
| Line up the places | Ones under ones and tens under tens, then always start with the ones. |
| Regroup when adding | If the ones add to 10 or more, write the ones digit and carry 1 ten to the top of the tens column. |
| Regroup when subtracting | If the top ones digit is smaller, take 1 ten from the tens column and add 10 to the ones. |
| Check subtraction by adding | The answer plus the number you took away should give the top number. |
Worked example
Find 52 − 17.
- Ones: 2 is less than 7, so regroup. Take 1 ten from the 5 tens, leaving 4 tens, and make 12 ones.
- 12 − 7 = 5. Write 5 in the ones place.
- Tens: 4 − 1 = 3. Write 3 in the tens place.
- 52 − 17 = 35. Check: 35 + 17 = 52.
Ready-made versions
Three fixed versions you can link to or share. Each is a PDF with its own answer key.
- Addition without regrouping Worksheets, version 1Worksheet PDFAnswer key PDF
- Addition without regrouping Worksheets, version 2Worksheet PDFAnswer key PDF
- Addition without regrouping Worksheets, version 3Worksheet PDFAnswer key PDF
Grade level and standard
Written for 2nd grade math (place value) and aligned to CCSS 2.NBT.B.5. It also works as review in later grades.
Common questions
- Is there an answer key?
- Yes. Every worksheet has a matching answer key with each answer worked on the same grid or layout as the question. The worksheet ID printed at the bottom of each page pairs a sheet with its key.
- Do any answers go over 100?
- No. Every sum is 99 or less, and every difference is positive.
- My child calls it carrying and borrowing. Is that the same thing?
- Yes. Many schools now say regrouping, because it describes what happens: a ten becomes 10 ones, or 10 ones become a ten.
- How many different versions are there?
- About a million per skill. Each time you press the button the problems are generated fresh, so you can print a different version for every student, a retake, or another night of practice.
- Are the worksheets free?
- Yes. They are free to print and copy for your home or classroom, with no sign-up.