Easy
9
×5
+1
÷2
−14
SQUARE
−1
÷5
−8
HALVE
Medium
59
×2
+8
×7/9
+1
÷3
−19
HALVE
−1
×5
Hard
124
−4
÷12
+2
×41/2
−6
×5/8
×90%
−1
×5
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).