Easy
7
+9
×5
−2
÷3
+12
HALVE
+5
÷8
SQUARE
Medium
58
×2
−6
DOUBLE
+5
÷9
−1
×1/2
+4
÷8
Hard
109
+3
÷14
+11
SQUARE
−1
×3/5
×25%
+2
×2/7
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).