# Worksheet: Column Addition of Three-Digit Numbers: Regroup Ones and Tens

In this worksheet, we will practice adding two three-digit numbers when we have to regroup ones and tens and record the calculation in columns.

**Q3: **

Add 266 and 547. Use place value blocks if you need to.

*Hint*: Do you need to regroup ones or tens?

**Q6: **

Use , , or to fill in the gap: .

- A
- B
- C

**Q7: **

Look at this calculation.

To find the sum, will you have to carry over any tens or hundreds?

- AI will carry over 0 over tens and 0 hundreds
- BI will carry over 1 ten and 1 hundred
- CI will carry over 1 ten and 0 hundreds
- DI will carry over 0 tens and 1 hundred

Find the sum.

- A652
- B642
- C542
- D552

**Q8: **

Find the sum.

**Q9: **

Calculate the following:

**Q10: **

Find the sum.

*Hint*: Think about whether you need to regroup.