Question

what is the most important question to ask yourself when you are checking work

what question do I need to solve
what info do I alr know
when I calculate another way do I get the same answer
does this make sense

Answer 1

Short answer: the most important question is, "Does this answer actually and fully address the original question?"

Why that is most important: you can do many correct calculations and still fail if you solved the wrong problem or left out a required piece. Once you confirm your result answers the question asked, the other checks make sure it's correct, complete, and presented well.

Useful checklist (order to follow)
1. Restate the problem in one sentence — make sure you solved that. ("What question do I need to solve?")
2. List what you know and what you must find. ("What info do I already know?")
3. Recalculate or use a different method to confirm the same result. ("When I calculate another way, do I get the same answer?")
4. Do a reasonableness/sanity check: units, magnitude, special cases, sign. ("Does this make sense?")
5. Check assumptions, edge cases, and whether the solution is complete and clearly communicated.
6. Quick final read-through for arithmetic, typos, and formatting.

Example (math): If asked "What is the area of a rectangle with sides 3 m and 5 m?"
- Restate: area of rectangle with sides 3 m and 5 m.
- Known: sides 3 m, 5 m.
- Compute: A = 3×5 = 15 m².
- Alternative check: think of 3 rows of 5 squares = 15 squares → 15 m².
- Sanity: units m², magnitude fits.
- Final: Answer 15 m².

If you tell me the kind of work (math, writing, coding, lab report), I can give a tailored one-question summary and a short checklist to use every time.