Easy
11
−1
÷2
+10
÷5
+6
×3
+12
÷3
−2
Medium
49
DOUBLE
−12
HALVE
−18
×5
+1
×1/2
−15
×2
Hard
102
−2
÷5
−12
SQUARE
×31/2
HALVE
×5/7
−5
×2
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).