Adds a self-checking puzzle built from this same problem set. Riddle and colour-by-answer add a section after the plain worksheet; maze replaces the problem list with a generated maze whose junctions are gated by a few of the problems — any leftover problems print afterward as bonus practice. All three ignore "problems per page" and print as one page, and include their own answer key.
For self-checking stations — prints a compact answer key box on the worksheet itself instead of making students hunt for a separate page.
Generates that many randomized sheets (Version A/B/C…) back to back — useful for preventing copying during a timed drill.
Instead of different random problems per version, every version above gets the exact same problem/answer set — just shuffled into a different order and renumbered. A neighbor's "#1" is a different problem, but the whole room is graded on the same set.
Builds three matching sheets from this template in one pass — same problem count and layout, with the operand range scaled down for Easy and up for Hard — so you can hand out the right level to each student without reconfiguring anything.
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