Question

Unit cubes are placed on a pan balance. There are 3 cubes on one pan and 9 cubes on the other pan. What can you do to make the pans balance? Solve this problem any way you choose.

Answer 1

Move three of the cubes from the pan with 9 to the pan with 3.
Then each pan has 6 unit cubes, so the masses are equal and the balance is level.