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Forum: The Pacific: General Aviation & Questions

19th Dec 2011, 23:54

Replies: 63

Mental maths - tips, tricks and shortcuts

Views: 27,395

Posted By Arm out the window

There'll always be a place for it. I like...

There'll always be a place for it.

I like new technology that makes life easier, but I don't think I've ever owned or used an electronic device that didn't malfunction in some way at some time.
...

Forum: The Pacific: General Aviation & Questions

19th Dec 2011, 06:03

Replies: 63

Mental maths - tips, tricks and shortcuts

Views: 27,395

Posted By Arm out the window

Or you can round a bit to make it easier - ...

Or you can round a bit to make it easier -

35% of 56:

Do 35% of 60, which is 3 and a half times 6, ie 21. Take a little bit off because 56 is a bit less than 60, call the answer 20.

Or to be...

Forum: The Pacific: General Aviation & Questions

17th Dec 2011, 22:48

Replies: 63

Mental maths - tips, tricks and shortcuts

Views: 27,395

Posted By Arm out the window

Percentages can be good for quick mental...

Percentages can be good for quick mental comparison between choices, or straight calculations.

For example:
Planned groundspeed 130 kt.
Say time for one leg of a nav is 33 minutes, do...

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