A 2nd grade student shared an algorithm for subtraction that was learned at home. This provides a great opportunity to make sense of mathematics! With a focus on place value, the algorithm can be made sense of by our students. 

The PDF Pencast simply explains the algorithm...share it in class and use it as a context to make sense of math, develop number sense, focus on place value.

NOTE: Adobe Reader DC (or equivalent) is needed to view the "video" aspect of this pencast PDF.

AN algorithm for subtraction

Created on 3/13/2017 by Scott Adamson

A 2nd grade student shared an algorithm for subtraction that was learned at home. This provides a great opportunity to make sense of mathematics! With a focus on place value, the algorithm can be made sense of by our students. 

The PDF Pencast simply explains the algorithm...share it in class and use it as a context to make sense of math, develop number sense, focus on place value.

NOTE: Adobe Reader DC (or equivalent) is needed to view the "video" aspect of this pencast PDF.

Standards
2.NBT.A.1 2.NBT.A.1a 2.NBT.A.1b 2.NBT.A.4 2.NBT.B.5 2.NBT.B.7 2.NBT.B.9
Math Practices
MP.1 MP.2 MP.3 MP.6 MP.7
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