Students profit from actually having to regroup picture representations of Base Ten Blocks as they subtract numbers. Beginning with a 1000 block and a roll of the die, the student / team must decide if they want to subtract that many 100's, 10's or 1's. The goal is to be the closest to zero. But if you subtract too much and go below zero, you'll go "bust." Everyone must roll the die 10 times. A score sheet, base ten paper manipulative masters ready to xerox on colored paper, spinner and ga