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Check out Graham's Building Fact Fluency Toolkit for addition and subtraction.

standard: 5.NBT.7

Download the Task

Act 1

Watch the video

  1. How long is the big paperclip? Estimate
  2. Write an estimate you know is too high.  Write an estimate you know is too low.

Act 2

How many times longer the large paperclip is compared to the small one.

Act 3

 Click the link here to find more 3-Act Lessons