Countdown Comet

What students practice

Students practice addition, subtraction, multiplication, and division facts, combining number tiles to make a target value, with ranges from sums to 20 using tables of 2, 3, 4, 5, and 10 up to sums to 100 using tables to 12.

How to play

Players press number keys 1 through 5 to select two tiles and fuse them using the operation shown on screen, with 0 or Backspace clearing the tray, racing to match the target before the comet's countdown clock reaches zero. Fusing the wrong pair shows the correct combination and brings that comet back later; three comets that get through end the mission.

Teacher Setup

Teacher Setup lets a teacher choose which operations are in play, the number size, and how many tiles make up an answer, along with speed and whether the answer is shown after a miss; the end screen includes a printable student report listing the operations practiced.

Play it in Starship Arcade

Countdown Comet is one of 16 games in the Mental Math Speed room, a members room on the Promenade.