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A power of 10
Let’s say I’m doing a math problem and the answer is 5000 and I get the answer 500. I’m off by an order of magnitude
If I’m doing a calculation and I just want a rough estimate, I could do all the calculations with just powers of 10, then my end result will be the same order of magnitude as the answer. So if I’m looking for an answer on the order of 10^30 and then someone gives a more precise answer of 2.2×10^25 then one of us made an error because our answers are off by 5 orders of magnitude
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