Nines, plus or minus

3-5, 6-8, 9-12, Contemplate then Calculate Tasks, Our Favorites, Structure through Number, 1

Goal: Think as a mathematician! Find a calculation shortcut by chunking, changing the form, or connecting to math you know.

CthenC Google Slides Nines Plus or Minus

CthenC Planner Nines Plus or Minus

CthenC Meta Reflection Nines Plus or Minus

See this task in action in Dwaina Sookhoo’s 6th grade class

Task found in the CME Algebra textbook

Back to Contemplate then Calculate Tasks

1 Comment

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Grace Kelemanik 8 years ago

I like this task because there are so many calculation shortcuts and each allows you to dig into properties (e.g. assoc prop of addition, comm. prop of addition, distributive prop, additive identity, etc.)

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Live Webinar: How to Use Three Reads to Create Independent Math Problem Solvers
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