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!

Addition:

Video: Addition on a Number Line to 10
     https://www.youtube.com/watch?v=UHmZHgcxp6k

Video: Find the Missing Addend - Numbers to 20
     https://www.youtube.com/watch?v=82Og_6gqAS0&feature=youtu.be

Video: Break Apart Strategy for Addition without Regrouping:
     https://www.youtube.com/watch?v=N1I7jjgaGGQ

Video: Break Apart Strategy for Addition with Regrouping
     https://www.youtube.com/watch?v=swyO0U8xDV0&feature=youtu.be

Video: Adding Four 2-Digit Numbers
     https://www.youtube.com/watch?v=cpMn37hFMSQ&feature=youtu.be

Video:  3-Digit Addition with Regrouping
     https://www.youtube.com/watch?v=5MaXPXVfETo

Subtraction:

Video: One Less or One Fewer:
     https://www.youtube.com/watch?v=6LpfqHUxwLY&feature=youtu.be

Video: Subtraction on a Number Line: Facts to 10
     https://www.youtube.com/watch?v=GkNT-FI4MpQ&feature=youtu.be

Video: Find the Missing Number - Subtraction, Numbers to 20
     https://www.youtube.com/watch?v=o2LjAyiwYvA&feature=youtu.be

Video: Subtracting Tens from 2-Digit Numbers
     https://www.youtube.com/watch?v=ckDRwA4xVmg&feature=youtu.be

Video: 2-Digit Subtraction with Regrouping:
    https://www.youtube.com/watch?v=UODHQy7u5zw

Video: 3-Digit Subtraction with Regrouping:
    https://www.youtube.com/watch?v=GhlAeQEfZVY

Video: 3-Digit Subtraction with Zeros with Regrouping:
    https://www.youtube.com/watch?v=ZmEGLVuPft4

Video: 3-Digit Subtraction with Zeros without Regrouping:
    https://www.youtube.com/watch?v=M3VA1TvzXeo

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

Addition and Subtraction:
Online Game: 2-Digit Addition or Subtraction with Regrouping:
     http://gregtangmath.com/stdalgorithms

Multiplication:

Video: Array: A Multiplication Strategy
     https://www.youtube.com/watch?v=iI51YPxuoE4&feature=youtu.be

Video: Repeated Addition: A Multiplication Strategy
     https://www.youtube.com/watch?v=HLUD4-8fWig&feature=youtu.be

Video: Grouping: A Multiplication Strategy
     https://www.youtube.com/watch?v=El4gyL6PUJc&feature=youtu.be

Video: The Commutative Property: A Multiplication Strategy
     https://www.youtube.com/watch?v=bvLCA_Jravk&feature=youtu.be

Online Practice: Relate grouping picture to repeated addition:              https://www.ixl.com/math/grade-3/relate-addition-and-multiplication-for-equal-groups

  Division:

Video: Division Array Strategy:
     https://www.youtube.com/watch?v=EAd8fOTC8Dk

Video: Dividing into Equal Groups Strategy
     https://www.youtube.com/watch?v=IeN0kj5wb9I

Video: Division: Repeated Subtraction Strategy:
    https://www.youtube.com/watch?v=r0X5yDxu944

Video: Division: Groups of 3:
    https://www.youtube.com/watch?v=3cEGiefpjAQ

Video: Division: Into 3 Groups:
    https://www.youtube.com/watch?v=AShIOiyRCto