2.NBT.5 - Subtraction with Renaming (Singapore Math)

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In this video, Mr. Almeida illustrates how to subtract when renaming happens using both a pictorial model and the traditional vertical model. This video addresses the Common Core math standards for 2.NBT.5.

Any feedback is greatly appreciated.
  1. MathwithMrAlmeida
  2. Mathwithmralmeida
  3. Joseph Almeida
  4. Alma del Mar Charter School
  5. New Bedford
  6. MA
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@mep766,

This video DOES demonstrate what is being asked of 2.NBT.5.

It reads:
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

The work being done allows students to understand the concept behind the procedural notation of subtracting. The standards says to subtraction within 100 (the subtrahend can be up to 100). Standard 4.NBT.4, asks for multi-digit work (more than 1, 000).

MathwithMrAlmeida
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@mep766

I hope this helps to clarify. I have been working with the actual writers of the Common Core State Standards for Mathematics as a fellow for the past year, and I am happy to answer any questions you may have or clarify any information. Please continue to question what is posted here, as our collective understanding as teachers of these standards is vital for proper implementation. I hope you enjoy these last few days of school.

MathwithMrAlmeida
Автор

This video process does NOT address Common Core math standard 2.NBT.5. That standard specifically addresses conceptual understanding -- using strategies based on place value, properties of operations and/or the relationship between addition and subtraction. The procedure modeled her is a 4th grade standard.

mep
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