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:

647+284=.

Q6:

Use <, >, or = to fill in the gap: 428+486382+138.

  • 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.

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