Roll 4 dice to create a 4 digit number. Partners use one sheet of paper for this. They create the largest number they can with the 4 digits.  Then, they take turns rolling two dice to create a tens digit. They take turns subtracting until they get zero. They miss their turn until they get exactly zero. They need to develop a little number sense with creating the two digit numbers to subtract by figuring out that they should maybe start with subtracting the largest they can create. But perhaps in the end when getting closer to zero, they need to use the smaller number. They have to think a lot with this and because they use the same running problem, they pay attention to each other's subtraction habits.