Addition, Subtraction, Mulitplication and Division.
 
4 - 1 = 3 x 1 =
9 - 3 = 8 - 8 =
18 - 10 = 11 - 2 =
5 ÷ 5 = 3 - 1 =
13 - 9 = 17 - 9 =
1 ÷ 1 = 17 - 9 =
2 + 1 = 8 x 1 =
9 x 8 = 2 x 4 =
9 - 5 = 0 + 2 =
1 ÷ 1 = 8 - 4 =
8 - 0 = 18 ÷ 3 =
9 - 2 = 14 - 8 =
6 + 2 = 45 ÷ 9 =
4 ÷ 1 = 3 - 2 =
2 x 4 = 13 - 6 =
6 + 12 = 63 ÷ 9 =
16 - 10 = 9 x 3 =
18 - 9 = 19 - 10 =
12 + 7 = 7 x 7 =
12 ÷ 4 = 0 x 3 =
14 - 7 = 6 ÷ 1 =
12 - 10 = 6 x 0 =
6 x 9 = 40 ÷ 8 =
11 - 8 = 14 ÷ 7 =
9 + 2 = 0 x 5 =