MULTIPLICATION BULLS EYE


Materials:
  • number cards (4 each of the numbers 0 through 9)
  • a 6-sided die
  • a calculator
Number of Players:

Two (2)

Directions:

Shuffle the cards and place them facedown on the playing surface.

Players take turns.  At each turn:

  1. Roll the die.  Look up the target range of the product in the table.
  2. Take 4 cards from the top of the deck.
  3. Use the cards to try to form 2 numbers whose product falls within the target range.  Do not use a calculator.  You need not use all 4 cards.  A number may not begin with 0.
  4. Multiply the 2 numbers on your calculator to determine whether the product falls within the target range.  If it does, you have hit the bull's-eye and score 1 point.  If it doesn't, you score 0 points.

The game ends when each player has had 5 turns.  The player who has scored the most points wins the game.

Number on
Die
Target Range of Product
1 500 or less
2 501-1000
3 1001-3000
4 3001-5000
5 5001-7000
6 more than 7000
Sample Turn:

A player:

  • Rolls a 3.  The target range of the product is between 1001 and 3000.
  • Turns over a 5, 7, 2, and 9.
  • Uses estimation to try to form 2 numbers whose product falls within the range--for example, 97 and 25.
  • Finds the product on the calculator:  97 * 25 = 2425.

Since the product is between 1001 and 3000, the player has hit the bull's-eye and scores 1 point.  Other possible winning products (from the 5, 7, 2, and 9 cards):  79 * 25; 279 * 5; and 57 * 29.