3-digit addition and subtraction with regrouping
This Grade 3 worksheet practices 3-digit addition and subtraction with regrouping (Common Core 3.NBT.A.2; Alberta Number 2).
20 vertical 3-digit addition and subtraction problems with regrouping. Free printable PDF with an answer key.
20 problems · answer key on the last page · each version has different numbers · Print from the browser
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On this sheet
- 392 + 713 — answer: 1105
- 914 − 861 — answer: 53
- 652 + 252 — answer: 904
How to teach it
- Line the numbers up by place: ones under ones, tens under tens.
- Start with the ones column, on the right.
- Adding: if a column makes 10 or more, write the ones and carry the ten to the next column.
- Subtracting: if the top digit is smaller, regroup one from the next column to make ten more.
- Check a subtraction by adding the answer to the number taken away.
Questions teachers ask
- How many problems are on this worksheet?
- 20 on one page, with the answer key on the last page.
- What grade and standard is it for?
- Grade 3. Common Core: 3.NBT.A.2. Alberta: Number 2.
- Can I print more than one version?
- Yes. Every version has different numbers and its own answer key. Use “Make another version” for a new one; the same version always prints the same.
- What does regrouping mean?
- Regrouping is trading ten of one place for one of the next. In addition, 10 ones become 1 ten (carrying). In subtraction, 1 ten becomes 10 ones (borrowing).
- What grade learns addition and subtraction with regrouping?
- In the Common Core, adding and subtracting within 100 with regrouping is Grade 2 (2.NBT.B.5), within 1000 is Grades 2 and 3 (2.NBT.B.7, 3.NBT.A.2), and the standard method with multi-digit numbers is Grade 4 (4.NBT.B.4).
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