Easy
16
−8
×7
−1
÷5
−2
SQUARE
+7
HALVE
+19
Medium
47
−10
×2
−8
DOUBLE
−6
÷7
−4
×3/7
−1
Hard
47
+3
÷10
SQUARE
×7
−4
×7/9
−1
×7/12
×2
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).