Easy
15
+1
HALVE
−2
×9
+2
÷4
−7
×6
+16
Medium
13
SQUARE
+7
×3/4
+3
÷9
−6
×8
×1/2
−11
Hard
73
×2
+6
×3/4
−14
×25%
−3
×7/11
HALVE
+45
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).