Adding 3-digit Numbers

Videos, stories and songs to help Grade 3 students learn how to add 3-digit numbers.

3-digit addition

Regroup ones and tens (using base 10 blocks & place value)
Example:
256 + 178 =
367 + 286 =
489 + 357 =

Multi-Digit Addition

Example:
215 + 32 =
1,850 + 354 =
145 + 809 + 77 =

• Show Step-by Step Solutions

Learn how to add 2- and 3-digit numbers.

Also learn how to check your answer using the inverse operation.
Example:
176 + 148 =
74 + 46 =
45 + 321 =

Addition with Regrouping Song

3-Digit Addition
Example:
597 + 911 =
189 + 985 =
231 + 496 =

• Show Video

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.