Subtraction by Regrouping

This 8-minute video demonstrates how to perform subtraction with regrouping. The presenter uses base-10 blocks to explain the rationale and to make a visual connection with the standard algorithm. The examples involve 2-digit and 3-digit numbers.
Resource ID#: 30155 Type: Tutorial
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Direct Link: http://www.mathplayground.com/howto_regroupI.html

General Information

Subject(s): Mathematics
Grade Level(s): 2, 4
Intended Audience: Educators educators
Suggested Technology: Computer for Presenter, Computers for Students, Internet Connection, Speakers/Headphones, Adobe Flash Player, Java Plugin
Keywords: regrouping, two-digit subtraction, three-digit subtraction, tens, ones
Instructional Component Type(s): Tutorial,  Video/Audio/Animation, 
Instructional Design Framework(s): Direct Instruction, Demonstration
Resource Collection: NSDL

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