Teacher Notes
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TIMS Bit
To begin the game, students draw a playing board on their papers as shown. The teacher chooses a digit at random from a set of Digit Cards 0–9. Make Digit Cards on index cards, use the Digit Cards 0–9 masters in the the Teachers Guide, or use a deck of playing cards. Use the ace for 1 and the joker or a face card for zero.
Students write the digit in a box in such a way as to try to get the largest sum. Once a digit is placed, it can't be moved. Then the teacher chooses a second digit without replacing the first. Play continues until the teacher has read enough digits to fill the boxes. The players with the largest sum win. Play again; however, change the addition sign to a subtraction sign. This time students try to find the largest difference.
W. Play Digits Game 
Play Digits Game for addition. Draw a playing board like this on your paper. As your teacher or classmate chooses the digits, write them in the boxes. Try to find the largest sum. Remember that each digit will be used only once.
