DOGGONE DECIMAL


Materials:
  • 1 deck of cards with 4 each of the numbers 0 through 9 (if you are using regular playing cards, aces count as 1 and queens as 0.)
  • 4 index cards labeled 0.1, 1, 10, and 100
  • 2 counters or coins per player (to use as decimal points)
  • calculator
Number of Players:

Three (3)

Object of the Game:

To have the most cards at the end of the game.

Directions:
  1. One player shuffles the number cards and deals 4 cards facedown to each player.
  2. The other player shuffles the index cards, places them facedown, and turns over the top card.  The number that appears (0.1, 1, 10, or 100) is the Target Number.
  3. Using 4 number cards and 2 decimal-point counters, each player forms two numbers, each with two digits and a decimal point:
    *each player tries to form numbers whose product is as close as possible to the Target Number
    *the decimal point can go anywhere in a number--for example:

  1. Players compute the product of their numbers on a calculator.
  2. The player whose product is closer to the Target Number wins all 8 number cards.
  3. Four new number cards are dealt to each player, and a new Target Number is turned over.
  4. The game ends when all four Target Numbers have been turned over.
  5. The player with the most number cards wins the game.  In the case of a tie, reshuffle the index cards and turn over a Target Number.  Play one tie-breaking round.
Example:
  • The index card turned over is 10, so the Target Number is 10.
  • Briana is dealt 1, 4, 8, and 8.  She forms the numbers 8.8 and 1.4.
  • Evelyn is dealt 2, 3, 6, and 9.  She forms the numbers 2.6 and 3.9.
  • Briana's product is 12.32 and Evelyn's is 10.14.
  • Evelyn's product is closer to 10.  She wins the round and the cards.