Easy
3
+6
SQUARE
+9
HALVE
−13
÷8
+11
×2
+13
Medium
51
×2
−15
DOUBLE
+2
÷8
×1/2
+4
÷5
SQUARE
Hard
59
×2
+34
×3/4
+2
×41/2
+11
÷13
−5
HALVE
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).