Since my other post was ignored, I'm reposting a greatly summarized, simplified version.(adsbygoogle = window.adsbygoogle || []).push({});

Can someone teach me the basics of working with significant numbers?

Here's the 2 example problems I'm working on.

Display the answer to the correct number of significant digits.

1. 142.47 + 30.2

2. 342 x 12

To read the problems I'm having and my attempts at the solutions, see this thread: https://www.physicsforums.com/showthread.php?t=135362

A quick, non-specific, crash course in layman's terms would be most helpful.

Thanks.

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# Homework Help: Help with simple introductory problems

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