I think practice with a slide rule also gets you to sanity check your method and think whether the answer can be correct.
Given how you could forget and inadvertently reverse the scales, etc, you have to think whether the answer you're getting makes sense by looking at the trend of the numbers. Plug and chug into a calculator takes some of that away.
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I think practice with a slide rule also gets you to sanity check your method and think whether the answer can be correct.
Given how you could forget and inadvertently reverse the scales, etc, you have to think whether the answer you're getting makes sense by looking at the trend of the numbers. Plug and chug into a calculator takes some of that away.