Math Support

4.NBT.1: Powers of 10

https://www.youtube.com/watch?v=9isCWlSrT-0

4.NBT. 2: Writing numbers in Expanded Form, Standard Form, and Written Form

https://www.youtube.com/watch?v=JBpklsNncOM&t=1s

https://www.youtube.com/watch?v=HnPjMfEi1HU&t=11s

 4.NBT.3: Rounding Numbers

https://www.youtube.com/watch?v=zdAhuQt81xg&t=22s

4.NBT.4: Adding and Subtracting Multi-Digit Numbers

https://www.youtube.com/watch?v=hTRnOJ 

https://www.youtube.com/watch?v=mAvuom42NyY&t=31s

https://www.youtube.com/watch?v=Y6M89-6106I