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

standard: 5.NBT.3

Download the Task

Act 1

Watch the video

  1. How many grapefruits will it take to fill the glass?
  2. What’s your prediction?

Act 2

Amount of juice from half a grapefruit

The capacity of the glass

Act 3

Click the link here to find more 3-Act Lessons