This subtraction board game requires no preparation. Just print, and add two paper clips and colored chips and you are ready to use it right away. In this game students place the paper clips on numbers to the sides of the game board. They will subtract the numbers and cover the answer with a chip of their color. The first person to get three of their color chip in a row is the winner. All of the subtraction problems are 4 digit minus 4 digit. This game correlates to the fourth grade common core math objective 4.NBT.B.4, and the third grade math objective 3.NBT.A.2.