How much do textbook solutions usually round?

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Textbook solutions typically round to one significant figure, as seen in the example where a calculation yields approximately 796,000,500,000, while the textbook states 8.0 * 10^14. This indicates that the textbook rounds to 8.0, suggesting the student's answer is close enough. The rounding method used in textbooks often aims for simplicity and clarity in presenting results. Understanding the rounding conventions can help determine if discrepancies in answers stem from calculation errors or rounding differences. Overall, the student's method appears to be correct based on the rounding standards.
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this is just a small question, how much do textbook solutions usually round? I just did a question that came to an equation 4*10^6 - 1 * 10^4 / (0.01/0.5(4*10^6 - 1 * 10^4))
the calculator says like 796 000 500 000 000. something something and the textbook says that it should be 8.0 * 10^14.. well, it's close enough - but how can I ever know if it's just a rounding thing or my method was way off?

thanks
 
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Hi emyt! :smile:

(try using the X2 tag just above the Reply box :wink:)

If it says 8.0, then it's rounding to 8.0 rather than 8.1 or 7.9 …

so it looks as if your 7.960005… is ok. :smile:
 
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