Easy
12
÷2
+3
×4
−15
÷7
+2
×9
−17
HALVE
Medium
27
−1
÷2
−4
SQUARE
DOUBLE
×5/9
−17
×2
−3
Hard
83
+45
×25%
+7
÷13
CUBE
+6
×6/11
×7
+14
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).