Celcius to Fahrenheit conversion shortcut

by Doug
(Murray, Ut, United States)

So I just watched the video about "the easiest way to do this" and I think I came up with a much easier way of doing it.

Just take the :
F=(9/5)C +32 equation and convert it to
F= 2C + 32 - 1/5C That way you can do it pretty much in your head. so take 30C and what is that in F?

2 x 30 + 32 - 1/5 x 30
60 + 32 - 6 = 86

I think that way is easier but what do you guys think?

Reply (by Keith)
Thanks for presenting this. Indeed I do see that this is another way to remember how to convert between C and F. Some people will like this way better, while others will find it confusing. Either way, thanks for the contribution.