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

standard: 5.MD.4&5

Download the Task

Act 1

Watch the video:

What do you notice? What do you wonder?

How many cubes will it take until the water overflows? Estimate
Write an estimate you know is too high. Write an estimate you know is too low.

Act 2

Small Cube Measurements

Container Measurements

Act 3

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