Dragons Subtraction 3 Digit by 3 Digit Regrouping Race uses 36 task cards and is perfect for your math center, to play the game "Scoot" or "Quiz, Quiz Trade", for early finishers, etc. Land on a dragon and it chases you back to start. There is a game board, recording sheet, and answer sheet. There are two sets of the same 36 math problems. The 2nd set of triple digit subtraction regrouping problems includes a line drawn between the hundreds, tens and the ones for students who need that support.