Students will learn how to find the volume of composite right rectangular prisms by adding and subtracting volumes of right rectangular prisms. Here's an example problem: Find the volume of the figure below:

Here's its solution.

Watch these Khan Academy videos in order:

Do these Khan Academy exercises, in order:

Next, give your students this challenge:

Clocks by NRICH

Conclude by leading this investigation:

Fractured Fractions – equivalent

by MathPickle

5.MD.C.5: Relate volume to the operations of multiplication and addition and solve real world and mathematical problems involving volume.