Add Three-Digit Numbers
Add the ones, then the tens, then the hundreds.
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This is sheet #41824601.
How to do it
- Add the ones.
- Add the tens.
- Add the hundreds.
Teaching tip
This page builds the habit of starting on the right. This sheet is aligned with Common Core 2.NBT.B.7.
About this worksheet
Three-digit addition on graph paper where no column adds up to 10 or more.
What kids practice
The same column-by-column method as two-digit problems, now with hundreds. Kids add or subtract the ones, then the tens, then the hundreds. Carrying and regrouping can happen in more than one column, and subtracting from a number with a 0, like 403 - 168, means regrouping a hundred into tens first.
Watch for
- Forgetting a carried 1 when there are two carries in one problem.
- In 403 - 168, trying to borrow from the 0 tens instead of going to the hundreds.
- Lining up the numbers wrong when one has fewer digits.
It's free to print, with Fewer, Standard or More on the page and an answer key. See the full adding and subtracting within 1,000 guide for 2nd grade.
More sheets in this set
- See it all
1. Three-Digit Regrouping ChartWorked examples of carrying twice in addition, and regrouping across a 0 in subtraction. 
3. Add with RegroupingThree-digit addition where at least one column needs a carry, sometimes two.
4. Subtract Three-Digit NumbersThree-digit subtraction where every top digit is big enough.
5. Subtract with RegroupingThree-digit subtraction with regrouping, including numbers with a 0 in the tens.
6. Add or Subtract?Three-digit addition and subtraction mixed on one page.
7. 10 More, 100 MoreFind 100 less, 10 less, 10 more and 100 more than three-digit numbers, in your head.