Easy
14
−4
×5
−2
÷8
−1
×2
−3
SQUARE
+4
Medium
48
DOUBLE
−8
÷4
−1
÷3
SQUARE
+5
×1/3
HALVE
Hard
100
×25%
×5
−1
×41/2
HALVE
−13
×2/7
+1
÷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).