Lesson: Column Addition of Three-Digit Numbers: Regroup Ones Mathematics • 2nd Grade
In this lesson, we will learn how to add two three-digit numbers when we have to regroup ones and record the calculation in columns.
Sample Question Videos
Daniel used place value blocks to show how to add 425 and 369.
What is the sum?
Add 544 and 438. Use place value blocks if you need to.
Hint: Do you need to regroup ones or tens?
Use the place value blocks to help you add 617 and 238.
Will we have to regroup when adding these numbers?
Add the ones. Write the missing number.
Hint: What do we do if we have 10 ones?
Add the tens. Write the missing number.
Add the hundreds. Write the missing number.