Use this game as practice and review of Estimating Differences of two and three digit numbers. Students are asked to round to the greatest place and then find the difference.
The game can be used in two ways:
1. It can be used with 2 players playing the traditional game of war. The card with the highest value would win.
2. It can be used as a matching game with one to two players. The player(s) would attempt to match cards of equal value.