Additon with regrouping

The below video is a great resource for addition with regrouping. It explains what to do is the sum is a one digit number or a two digit number.

 https://www.youtube.com/watch?v=QAL8XxyGVow&list=PLcHBoN1Wbu2MfPWJiRy0ritMVxVz4te_P

Below is a great website to find practice pages for addition and subtraction.
http://www.math-drills.com/

Subtraction with regrouping

https://www.youtube.com/watch?v=wphuh-M6bMg

This is cute video that helps explain the steps to subtraction with regrouping. It is a little loud but it gets the kids attention and explains everything very well.

www.ixl.com
This website will offer lots of practice problems!
Choose second grade and scroll down till you find subtraction with regrouping.