Instant temperature conversions - trick for convert between Fahrenheit and Celsius! - Free Educational videos for Students in K-12

Instant temperature conversions - trick for convert between Fahrenheit and Celsius! - By tecmath

Transcript


00:0-1	Good day , Welcome to the Tech Math channel .
00:01	What we're going to be having a look at in
00:03	this video is a really easy way of changing between
00:07	the two major temperature scales we use . That is
00:09	Celsius and Fahrenheit . So it's not 100% exact ,
00:13	it has slighter differences from the actual answers , but
00:16	they're fairly good for on the fly rough calculation .
00:19	Okay , so the way we are going to do
00:21	this is first off , we'll look from Celsius to
00:23	Fahrenheit . Fahrenheit . Celsius , it's fairly simple .
00:26	So first off say we want to change from Celsius
00:30	to Fahrenheit . Okay . Uh yeah , and its
00:34	most simple . What we do is as follows ,
00:37	What we do is we gonna first off get our
00:39	temperature in C and multiply it by two And then
00:43	we're going to add 30 to answer . Okay ,
00:47	and it's as simple as that . In fact ,
00:49	the actual formula when you really do it is you
00:51	multiply it by 1.8 and add 32 to it .
00:55	So it's a fairly close approximation to that you're going
00:57	to see . And I will mention what the actual
00:59	amounts are and you'll see how far they are out
01:01	as we go . So first off let's go through
01:04	a few examples , they say I want to change
01:06	12 degrees Celsius into what it is in Fahrenheit .
01:10	So first off we're going to multiply by 2 ,
01:13	12 by two is 24 plus 30 Is going to
01:18	be 54 . Okay , so 54°F, , pretty easy
01:23	. Right , Okay , so in reality it's actually
01:27	about 53.6 , so it's not not too bad .
01:29	Okay so it's pretty easy . Yeah , okay let's
01:33	have a look at another one of these , let's
01:35	go a bit higher . Now let's go up to
01:37	100 degrees Celsius where water boils . Okay , so
01:41	100 degrees Celsius . When we changes to our Fahrenheit
01:44	. So first off we're gonna multiply by two ,
01:46	so 100 times two is 200 plus 30 is 200
01:51	And 30°F. . Not bad . The actual answer is
01:56	212 . So it's a little bit further at this
01:58	time . The bigger the numbers , the more margin
02:01	of error you seem to get with this . Okay
02:03	. It's not bad for an on the fly sort
02:04	of calculation though . Okay , so let's have a
02:08	look at another one of these . See see if
02:10	you can work it out , see if you can
02:11	work it out before I can work it out .
02:13	Okay . Because you know , I'm going to speak
02:14	a bit of gibberish between uh between Writing it and
02:18	working it out . So what about 46 degrees Celsius
02:23	? So gibberish , gibberish , gibberish . Have you
02:25	worked it out yet ? 46 times two is 92
02:29	degrees . Okay , 92 plus 30 degrees is going
02:34	to be 1 22 one , The actual answer by
02:40	the way . In reality we use the proper formula
02:42	, it's around about 100 and 15 , so it's
02:44	seven degrees out there . It's not a huge amount
02:47	. Okay . Uh I mean if you have to
02:49	be exact obviously use the proper formula , so how
02:51	do you go with that ? Good . Good .
02:53	Hopefully . Hopefully . Well okay so what about ,
02:56	we're going to now do the opposite , we're going
02:59	to have a look at changing between Fahrenheit in two
03:04	Celsius . Okay , So instead of what we were
03:09	doing before , where we were times in by two
03:12	Adding 30 , we're going to do the opposite in
03:14	the opposite direction , we're gonna subtract 30 and then
03:17	we're going to get this and we're gonna divide our
03:19	answer by two . Okay , so you're gonna see
03:21	it's the exact opposite of what we were doing ,
03:23	were just sort of reversing what we were doing before
03:26	. Mhm . So let's have a go with this
03:28	. Uh Let's start off with 100 and 10 F
03:32	. Nice warm day . So anyway Take off 30°
03:38	128 30 is 80° divided by 2 40°C. . The
03:44	actual answer by the way is about 43°C. . So
03:48	we're not too badly out there . That's a daytime
03:50	temperature makes the difference between hot and stinking hot I
03:54	guess . Let's have a look at another one of
03:57	these . Okay , what about if we were to
04:00	do What about 40°F, , colder now . 40° Take
04:07	away 30 . Okay . There we get 10 Divided
04:10	by two about 5° 5°C. . The actual answer about
04:16	4.5°. . So yeah , not too bad . Yeah
04:21	. Okay . I can now see if you can
04:22	do this faster than I can spout gibberish I guess
04:25	again once again . So let's start with 74 degrees
04:29	74 degrees and I'm gonna change this into cell C
04:32	she might have worked this out by now . So
04:33	let's go 70 for take away 30 we have 44
04:36	degrees divided by two is 22 degrees . Hopefully you
04:41	got the right answer there . Okay , this is
04:43	a really , really great little method I have um
04:46	I live in Australia so we are tend to use
04:48	Celsius where we are but I have an oven and
04:50	I also have a thermostat in the house which is
04:52	in Fahrenheit because it's just the way it is .
04:54	And so I use this method a fair bit when
04:57	I'm , when I'm working these are not look I
04:59	could I could probably work and reprogrammed the thermostat ,
05:01	but we know it's not going to happen right anyway
05:05	. Hopefully you enjoyed that video . Hopefully that helped
05:07	you out . Hopefully you are really like that method
05:10	. Anyway , See you next time . Bye .

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Instant temperature conversions - trick for convert between Fahrenheit and Celsius! is a free educational video by tecmath.

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