3 Digit Addition With Regrouping
Every problem on this sheet carries at least once, and many carry twice. Some answers reach the thousands. The sheet has 20 stacked problems for grades 2 and 3 and takes about 15 minutes.
- Grade
- Grade 2–3
- Problems
- 20
- Time
- About 15 minutes
- Standard
- 2.NBT.B.7, 3.NBT.A.2
Download
Download PDF (US Letter) Download PDF (A4)Two pages: the worksheet, then the answer key. No sign-up needed.
Part A Add. Start with the ones column.
- 905+ 5351440
- 905+ 2971202
- 353+ 548901
- 327+ 181508
- 707+ 278985
- 394+ 377771
- 599+ 9791578
- 825+ 5041329
- 544+ 6011145
- 789+ 149938
- 476+ 115591
- 225+ 166391
Part B Add. Check each answer by estimating.
- 137+ 113250
- 657+ 6981355
- 315+ 7551070
- 566+ 4591025
- 731+ 5831314
- 886+ 8561742
- 556+ 8211377
- 358+ 404762
Tips for teachers and parents
- Use the same steps as 2-digit regrouping in each column: add, write the ones digit, carry the ten.
- Expect a carry to land in a column that also needs one. In 368 + 275, both the ones and tens carry.
- Students who struggle can write the partial sums first: 300 + 200, 60 + 70, 8 + 5, then add the three results.
- Check with an estimate to the nearest hundred.
Common mistakes
- Forgetting a carry in the middle column. Have students cross out each carried digit once it has been added.
- Treating a 4-digit answer as wrong. 785 + 467 = 1,252 is correct.
What to practice next
Try 4-digit addition, or practice 3-digit subtraction with regrouping.
Frequently asked questions
How do you add 3 digit numbers with regrouping?
Add each column from right to left. When a column adds to 10 or more, write the ones digit and carry the ten to the next column.
Can a 3 digit addition answer have 4 digits?
Yes. When the hundreds add to 10 or more, the answer is in the thousands, such as 600 + 500 = 1,100.
Which standard does this cover?
Common Core 2.NBT.B.7 and 3.NBT.A.2, adding within 1,000 using place value.