Add ANY Fractions Instantly! Fast math trick! - Free Educational videos for Students in K-12

Add ANY Fractions Instantly! Fast math trick! - By tecmath

Transcript


00:0-1	Good day . Welcome to the Tech Math channel .
00:01	What we're going to be doing in this video .
00:03	I'm going to show you how to add fractions with
00:05	different denominators instantly without all that messing around that you've
00:09	probably been taught in school where you have to find
00:11	common denominators and all that sort of junk . We're
00:13	going to skip all that step , right ? And
00:15	I'm gonna get you straight into it . So let's
00:17	just get into an example . Let's get one quarter
00:20	and to this , we're going to add one third
00:24	. Nice . Easy one to start off with .
00:26	They will get harder . So how do we go
00:28	about getting our answer here ? Well , first off
00:31	, let's get the bottom number . The denominator .
00:33	We're going to get our two denominators from what we
00:35	got here , the fourth and the three . And
00:38	we are going to multiply this four times 3 .
00:42	We've got our denominator , which is 12 . The
00:45	next step is we're going to start at the top
00:47	left here with our one and we're gonna multiplied by
00:50	this number here on the bottom right ? So let's
00:53	multiply those one time three is equal to three .
00:59	The next step is we're going to start at the
01:02	bottom left here and we're going to multiply it by
01:04	this number at the top right here . Okay ,
01:07	So one times four is equal to four and because
01:11	we're adding , let's put the addition symbol there .
01:14	So what have we got ? We have the following
01:17	3-plus 4 is equal to seven . The bottom number
01:21	, the denominator is 12 and there's our answer as
01:24	you can see there's not tons of working out working
01:26	out the common denominators were pretty much has done this
01:29	directly . So what about another example ? Okay ,
01:33	what about we do this one ? What about we
01:35	do 2/3 and to this we're going to add three
01:40	fits . Okay , a bit harder now . Bit
01:42	bigger . And I can tell you that our answer
01:45	is going to be over one . So we are
01:46	going to have to simplify it at the end and
01:48	occasionally you will have to do that . So first
01:51	off , let's get our answers here . three times
01:54	5 is equal to 15 For the next part of
01:58	our answer . We're going to multiply this by this
02:01	, two times five is equal to 10 , the
02:04	next one , three times 3 is equal to nine
02:09	. And we're going to add our answers . We're
02:11	adding fractions here , so 10 plus nine is equal
02:15	to 19/15 . Now we can simplify this further .
02:19	We've got an improper fraction answer here , but let's
02:22	simplify it , 19 divided by 15 is equal to
02:25	one and there is four left over . The four
02:29	goes there and our bottom denominator here goes here .
02:33	Okay , so one and 4/15 . All right ,
02:37	one more example then I'm going to give a bunch
02:39	of them to you to do Okay For our third
02:41	example , let's get three quarters . And to this
02:44	let's add 3/7 . I'm going to give you a
02:48	bunch of these are doing a second , we'll just
02:49	get through this example . We have this line here
02:52	and let's work out our denominator . four times 7
02:57	is 28 . Let's work out top left times the
03:02	bottom , right . Three times seven is equal to
03:05	21 . 3 times four is equal to 12 and
03:11	we are adding here . So 21 plus 12 is
03:15	33 . 33/28 . What does this equal ? Well
03:20	we can simplify this a bit further now . 33
03:23	divided by 28 is one and there is five left
03:26	over Uh five it's going to go over 28 anyway
03:31	. What about a few examples for you to do
03:34	? Okay , what about we go one quarter and
03:37	to this we're going to add uh 3/5 . You
03:42	can do that one . And we're also going to
03:44	do to over nine . And to this we're going
03:50	to add 1/4 a quarter . Let's see what it
03:55	adds is are so first off , let's work this
03:59	out . Okay , four times 5 is equal to
04:04	20 . All right , next we have one times
04:08	five and this is equal to five . We have
04:12	this one here , three times four . This is
04:14	equal to 12 and we are going to be adding
04:17	here . This is equal to 17 Over 20 heads
04:22	. You go with that . Let's have a look
04:24	at the second one here . Okay , nine times
04:27	four is equal to 36 . The next one we're
04:31	going to be doing is two times four is equal
04:34	to eight To this . We're going to be adding
04:37	one times nine which is nine and all right .
04:41	We got a plus in there . Eight plus nine
04:44	is equal to 17 17/36 . And we can't simplify
04:49	these guys anymore . So we're going to leave our
04:51	answers there how they are anyway . What did you
04:54	think of that ? That is how you go through
04:56	and you add fractions with different denominators instantly and you
05:00	can probably guess what we're going to do when we're
05:01	subtracting fractions with different denominators instantly . But I'm going
05:05	to save that for another video anyway . Thank you
05:07	for watching . We'll see you next time . Bye
00:0-1	.

Summarizer

DESCRIPTION:

OVERVIEW:

Add ANY Fractions Instantly! Fast math trick! is a free educational video by tecmath.

This page not only allows students and teachers view Add ANY Fractions Instantly! Fast math trick! videos but also find engaging Sample Questions, Apps, Pins, Worksheets, Books related to the following topics.