# 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.

Q1:

Jacob used place value blocks to show how to add 243 and 688. What is the sum?

Q2:

Add 242 and 167. Use place value blocks if you need to. Hint: Do you need to regroup ones or tens?

Q3:

Add 266 and 547. Use place value blocks if you need to. Hint: Do you need to regroup ones or tens?

Q4:

Write all the numbers in the sum. Use the place value blocks to help you. • A • B • C • D Q5:

.

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. 