3rd Grade Math Centers

Add the Difference

Materials: numeral cards (0-9), calculator Number of Players: 2

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1. Shuffle the cards and place them facedown in a pile. Take five cards each from
   the top of the pile.


2. Select four cards to keep and return one card to the bottom of the pile. Arrange
   your four cards to make two 2 - digit numbers and calculate the difference
   between them. This is your score for the round.

Example: Tom picks up 1, 5, 8, 7 and 3. He returns

5 to the bottom of the pile and arranges the

four cards to make 87 – 13. The difference

between 87 and 13 is 74, so Tom scores

74 points for the round.

3. Play another round. Calculate the difference between your two 2-digit numbers

and add this number to your score. Use a calculator to check your opponent’s

work.

4. Continue to make 2-digit numbers, calculate the difference between them and

add this number to your score. The first player to reach a score of 500 points

wins the game.

(^8 7 5)
1 3