TITLE: Digit Symmetry

SUBJECT: 7th grade math/Pre-Algebra

TOPIC: Reflection and Symmetry

INTERACTIVITY: The player will place digits (that will be found in folders) onto a black board. The object for the player is to place the digits onto the black board so that the sum of the first two rows will remain the same when the board is rotated 180 degrees.

DIRECTIONS FOR USE: On the bulletin board you will find folders containing the digits 0, 1, 2, 5, 6, 8, and 9. Place the digits onto the black board so that the sum of the first two rows will remain the same when the board is rotated 180 degrees. Digits can be repeated and any digit can appear in any spot. When the puzzle is completed fill in the worksheet with the correct answer, place the worksheet into the turn it in folder, and place the digits back into their folders on the bulletin board.

TIME: 20 min.

SPECIAL CONSTRUCTION: This bulletin board contains folders, digital numbers backed with Velcro, and a black board backed with Velcro that is to be rotated by the player.

CREDIT: By completing the puzzle and handing in this worksheet the player will receive 5 extra points on the next test.

OTHER COMMENTS: The players are to keep in mind that in order to obtain the correct answer the sum of the digits must be the same when the black board is rotated 180 degrees. The black board is held onto the bulletin board with Velcro so that the players can rotate their answer. Also, if the players are having a hard time receiving the correct answer the instructor might consider reviling that the digits in the upper left and lower right corners are both zeros.