Dividing Decimals - Free Educational videos for Students in K-12

Dividing Decimals - By tecmath

Transcript


00:0-1	Welcome to the Tech Math channel . What we're gonna
00:02	be having a look at this video is how to
00:04	divide decimals . Okay , uh Now look , dividing
00:08	decimals is much like dividing normal numbers . It's just
00:11	got a couple little tweaks to it . And especially
00:13	if you've already started multiplying decimals and you're pretty confident
00:16	with that , you'd probably be pretty good with this
00:18	. So I want to go through a few examples
00:21	to show this . So first off , an example
00:23	we might use is , what we will use is
00:25	we will do 25.68 and we're gonna divide that By
00:34	0.4 . Now , when we do this , as
00:36	I said , it's fairly similar to normal division .
00:38	In fact , I'm going to treat this initially like
00:40	normal division , so I'm going to actually treat this
00:42	like 2568 divided by four . And then we're going
00:46	to deal with the decimal places because It's going to
00:50	end up with the same numbers . If it was
00:51	2,568 , divided by four , it's just the decimal
00:54	place is going to be in different spots . So
00:57	first off , let's do this in . So let's
00:59	go to 568 Are we going to divide this by
01:09	four ? So let's do this now . four into
01:13	two . We cannot do . So I put a
01:15	zero there 4 25 . That goes six times 6
01:20	. 24 and we're going to carry the one because
01:23	there's one left over 4 to 16 guys four times
01:29	With no remainder and 14 to 8 goes two times
01:34	to answer . It's 642 . Okay , so how
01:39	do we do with this test in place now ?
01:40	That's really , really easy . But it's a great
01:42	question . So first off , what we do is
01:44	we count the number of decimal places Uh here .
01:48	Okay , so there's 1 , 2 decimal places .
01:52	This is in our number that we're actually dividing and
01:56	this is another were divided by Okay . And there's
01:59	one decimal place And we get this over here too
02:03	and we take this one away so to take away
02:05	one his work . Okay . So we're gonna have
02:09	one decimal place . So with our one decimal waste
02:14	. That means Your answer has one decimal place .
02:16	So the answer is 64 . What ? Okay .
02:24	All right . How did you go with that ?
02:26	I'll tell you what , We'll give you one more
02:27	example with this rough that out . And our example
02:32	will be as follows . So you're just you're just
02:34	going to do that with the deaths . It's fairly
02:36	simple . But you know how to do it .
02:38	So why don't we do this ? 132 15 We're
02:45	going to divide that By 0.00 five . Now look
02:52	being five moments , you know this is going to
02:54	go into fairly nice . We're gonna treat this once
02:57	again like 3215 , divided by Mhm . What ?
03:07	So let's do this , they're uh different color down
03:11	uh five and a three . We can't do so
03:13	I'm gonna put a zero down there . 532 goes
03:17	six times With two left over . 5 21 goes
03:23	four times with one left over and 5 15 those
03:28	three times . So we get this answer is 643
03:32	. So we have can we can't we can't with
03:34	the decimal places are going to go , we have
03:36	$3 here , They're behind the decimal place . We
03:40	have 123 numbers here that are behind the decimal places
03:44	to take away three Is -1 . This is a
03:49	bit of a trick . How can we put a
03:51	-1 decimal place and I'll show you how this is
03:55	here . So we have 643 and instead of going
04:01	this way , okay , putting your death always won
04:04	best ways . We're actually going to minus where we're
04:06	gonna go this way . Okay , someone's gonna go
04:09	here and here we put a zero . So answer
04:14	is 6430 . So if you're getting these negatives you're
04:18	actually going to add on an extra zero or an
04:21	extra couple of Zeros . Okay . Just a little
04:24	trick to be aware of , I'll tell you what
04:26	, I reckon we'll do one more . So the
04:30	one will do now is as follows . Uh We
04:35	will go UB 630 . Right , who won ?
04:43	Uh we're going to 19 and we're going to divide
04:47	that by , let's divide this by died . So
04:55	That's right this out as usual . six 38 1
05:01	9 . We're going to divide that by No .
05:06	So let's start making our answer here . Uh So
05:11	92 6 . We can't do 1963 or seven ,
05:18	So it's a 79 8 . We can't do .
05:21	So I put a zero there and carry the eight
05:23	. So 1981 guys nine times and 19-9 goes once
05:28	. So we have this answer of 7,091 . How
05:32	many different ways is are we going to have we
05:34	have to hear we have done here . So to
05:40	take away nothing is we should end up with two
05:43	decimal places . Okay ? To take away nothing is
05:46	too so we're gonna end up with one 1 ,
05:50	2 decimal places and put it up there where it's
05:53	supposed to go . Okay , whispered all the wrong
05:56	part . So the answer is 79 1 . How
06:02	did you go with that ? Good . All right
06:04	. Hopefully you're really , really confident with these and
06:07	any questions comments , put them down and we'll see
06:10	you next time . Bye .

Summarizer

DESCRIPTION:

OVERVIEW:

Dividing Decimals is a free educational video by tecmath.

This page not only allows students and teachers view Dividing Decimals videos but also find engaging Sample Questions, Apps, Pins, Worksheets, Books related to the following topics.