# Lesson Worksheet: Column Addition of Three-Digit Numbers: Regroup Ones and Tens Mathematics • 2nd Grade

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:

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

Q2:

Add 266 and 547. Use place value blocks if you need to. Hint: Think about whether you need to regroup.

Q3:

Write all the numbers in the sum. Use the place value blocks to help you. • A • B • C • D Q4:

.

Q5:

Find the sum. Q6:

Look at this calculation. To find the sum, will you have to regroup any tens or hundreds?

• AI will regroup 0 tens and 0 hundreds
• BI will regroup 1 ten and 1 hundred
• CI will regroup 1 ten and 0 hundreds
• DI will regroup 0 tens and 1 hundred

Find the sum.

Q7:

Calculate the following: Q8:

Find the sum.

Hint: Think about whether you need to regroup. Q9:

Find the sum.

Hint: Think about whether you need to regroup.

Q10:

In a parking lot, there are 248 green cars and 473 blue cars.

Use column addition to find the total number of cars.