### Operations

If you are looking for 2-digit subtraction or addition with regrouping there are some websites under the tab “Math Variety Links” tab that also have some regrouping games. Feel free to explore those sites, too!

Video: Addition on a Number Line to 10

Video: Find the Missing Addend - Numbers to 20

Video: Break Apart Strategy for Addition without Regrouping:

Video: Break Apart Strategy for Addition with Regrouping

Subtraction:

Video: One Less or One Fewer:

Video: Subtraction on a Number Line: Facts to 10

Video: Find the Missing Number - Subtraction, Numbers to 20

Video: Subtracting Tens from 2-Digit Numbers

Video: 2-Digit Subtraction with Regrouping:

Video: 3-Digit Subtraction with Regrouping:

Video: 3-Digit Subtraction with Zeros with Regrouping:

Video: 3-Digit Subtraction with Zeros without Regrouping:

Online Game:  3-Digit Subtraction with and without Regrouping:  Tic Tac Toe Squares:
http://www.funbrain.com/cgi-bin/ttt.cgi?A1=s&A2=12&A3=0

Online Game: 2-Digit Addition or Subtraction with Regrouping:

http://gregtangmath.com/stdalgorithms

Multiplication:

Video: Array: A Multiplication Strategy

Video: Repeated Addition: A Multiplication Strategy

Video: Grouping: A Multiplication Strategy

Video: The Commutative Property: A Multiplication Strategy

Online Practice: Relate grouping picture to repeated addition:

Division: Video: Division Array Strategy: