4th Grade Visualizing with Fractions - Free Educational videos for Students in K-12 | Lumos Learning

4th Grade Visualizing with Fractions - Free Educational videos for Students in k-12


4th Grade Visualizing with Fractions - By Lumos Learning



Transcript
00:05 So we got this cupcake here and this cupcake here
00:10 . I'm gonna give you two thirds of this cupcake
00:12 because I know two thirds is a larger fraction in
00:14 three fists , but and I'm gonna take 3/5 of
00:16 this one . Is that fair ? You would get
00:19 larger slices from the pain , boy . Why ?
00:24 Mhm ? Because the cupcake is bigger . Oh ,
00:30 so what does that mean ? What do we have
00:32 to have and have to know when we're dealing and
00:36 comparing with fractions ? Come on , guys . Think
00:42 about it . Mhm . We think equal sizes .
00:50 Who agrees with that ? Yeah . Why do you
00:53 agree with that ? Everybody's gonna want a piece of
00:56 the big cupcake because it's bigger . So the pieces
01:00 of the smaller cupcake going to be the same is
01:02 that he's a big cupcake . Why not ? Because
01:06 the pieces are going to be large . Why ?
01:10 Because the cupcakes larger So the cupcakes larger . So
01:14 what has to be true ? We have to have
01:16 the same size yelling at me the same size .
01:20 What ? What ? What is it ? What is
01:25 the thing we compare with with fractions ? What's that
01:27 vocabulary word ? Mhm . We gotta get our vocabulary
01:32 down hole . All right . So let's say that
01:35 again . We have to have the same no same
01:43 size ho . So is the whole of a fraction
01:49 . Extremely , extremely important . Okay , you gotta
01:54 take that nugget and keep it in your head forever
01:56 . Now you have to have the same size hole
02:00 cannot compare fractions . Cannot do anything with fractions if
02:04 you don't have the same size hole . All right
02:07 ? Yeah . Now we're going to practice . If
02:13 we have two thirds or three fours , we're going
02:16 to compare them and figure out which is greater .
02:21 How in the world do I get my whole ?
02:25 How do I draw my ray ? How do I
02:28 figure out how to start here ? Well , I
02:31 have to look at what do you think ? Dance
02:35 with that paper . And what do you think ,
02:38 Aiden ? How do you think I get the same
02:41 ? How am I gonna get my whole What do
02:45 I need to look at ? Okay , I'm gonna
02:59 use the squares . I'm gonna give you a little
03:01 hint . Look at . Yeah , Isabel , You
03:11 said it . And my right here . How many
03:15 total squares did I have ? 15 . 15 ?
03:19 I was comparing 3/5 and two thirds . Where do
03:26 you think I got 15 from Ira ? I see
03:30 some light bulbs going off . Look at the two
03:31 fractions I compare . Now look at the array I
03:35 used for my comparison . What do you notice about
03:38 it ? Make some connections about a raise . When
03:40 you did a raise back in multiplication , What do
03:46 you see here ? Look at my dimensions of my
03:49 right . Look at the dimensions . Eyes up there
03:52 . Look at the dimensions of my ray . What
03:54 do you notice about them ? Where did I get
03:57 them ? Where did I get the dimensions of my
04:00 rate ? So you didn't nominate . You're exactly right
04:03 . You can You're good . Okay , so I
04:06 have a 12345 by 123 Array . Where did those
04:12 come from ? My denominators . Okay , so now
04:18 that we have that , let's go back and look
04:19 at two thirds or three . Force . What's as
04:25 a ray ? Am I gonna draw here to compare
04:31 ? Thanks , guys . We just said it Eyes
04:34 up there . Where am I going to get the
04:36 dimensions from our right ? Caitlyn ? Denominator ? The
04:40 denominators . Alyssa , where do we get the dimensions
04:43 for our array ? Caitlin just told you . You
04:51 know the denominators . Okay , so let's on your
04:55 paper . I want you to draw a three by
04:58 four array . Use the lines on your grid paper
05:07 to help you . Yeah . Three by four .
05:15 Yeah , yeah , yeah . Okay , so we
05:25 have our three . About four . Now we have
05:27 to shade in . Oh , we got cricket .
05:30 Minus two thirds . How are we going to shade
05:34 in ? Two thirds ? Two out of three .
05:41 Fix this . Two out of three . Go ahead
05:47 and do it shade in two thirds of your array
05:50 . Two out of every three . Two thirds ?
06:01 Yeah . Is that a four by three ? Uh
06:11 , you have 123412 four . Rhetoric . Two out
06:15 of every three . Okay . Okay . Yeah .
06:36 What ? See how crafty I am ? Okay .
06:56 All right . Here's what I saw . As I
06:57 walked around , I saw uh huh . And then
07:06 I saw one problem . It's not like I'm like
07:15 , that was the same thing . Austin , you're
07:19 shaking your head . Why are those the same thing
07:23 ? Yeah . Mhm . Yeah . What fraction are
07:28 they both showing ? What fraction is that ? Okay
07:44 , what ? Fraction 22 out of 32 3rd .
07:50 So here . 12 out of three . 12 out
07:55 . of three 12 out of 312 out of three
07:59 . I saw that . And then I saw one
08:04 two out of three equal parts . If these are
08:09 the three equal parts , some people shade it in
08:12 two whole columns over here . Some people shade it
08:18 in two of three . Are they equivalent ? Is
08:22 that the same thing ? Yeah . Okay , so
08:26 however you see it in your mind , that's okay
08:29 . As long as you shade in two thirds .
08:32 Two out of three . Okay , so now let's
08:36 do three fours . What size of Ray do we
08:38 have to draw for it ? Cool . It has
08:42 to be the What if we're comparing fractions ? They
08:47 have to be the same one . Thank you .
08:51 Say it again . All right . So what side
08:55 of the ray are you gonna draw ? What size
09:00 array Are you gonna draw ? 343 three by four
09:07 . What size is your ray gonna be ? Thank
09:11 you . Now draw it . Yeah . Okay .
09:20 Calling . Yeah , Yeah . All right . Who
09:41 once again up and show us what fraction is greater
09:44 and why he's who we're going to pick on .
09:52 All right . Caitlin , you haven't been up all
09:55 eyes on Kate because you might need some help with
10:05 two thirds of this , it looks Yeah . Um
10:13 , you can't lean on it , babe , if
10:16 you lean on it . Yeah , it looks like
10:20 that , but 3/4 is a lot like pick the
10:24 same thing . Only it's put a different can't way
10:29 . Yeah , it looks like that . So which
10:38 fraction is greater ? Caitlin 34 Because his two thirds
10:43 is only two parts out of four and 3/4 is
10:47 three parts out of four . Say it there .
10:52 Stay up there . Does anybody have anything to say
10:54 about Caitlin's explanation or visual or anything ? Yeah .
11:02 Yeah , I got some to say . We got
11:03 to say that two thirds , right ? Okay .
11:09 Who agrees with Isabella ? Okay . Why do you
11:16 agree with Isabella ? She put six covered and ,
11:19 um and it was it , um , attitude .
11:23 Okay . What does that look like when you just
11:26 look at that ? What does it look like ?
11:27 Shaded ? What fraction does it look like ? Shade
11:31 it . I have We're good at half . We
11:34 know a half . That was like a half Kalen
11:37 . Is that like I have to ? You does
11:39 it for Does it still like a half is shaded
11:50 . Let's think about Caitlin . How many did you
11:52 shape ? I appreciated 66 How many total total squares
11:57 are in ? Their 12 is six . Half of
12:00 12 is half and two thirds the scene . So
12:05 what's going on ? She Do you want to phone
12:09 a friend That can help you . Okay . Stuff
12:14 , Isabella . Alright . Y'all better get right .
12:20 Okay . I'm thinking I'm thinking that lines may have
12:26 helped . I don't know . What do you all
12:27 think ? Yeah , you are too quiet for me
12:31 . Come on . You got to talk . I
12:34 got here within those brains . I think I know
12:39 what I think . She was looking at it a
12:42 different way . Okay , so how do we fix
12:44 it ? Can I read you ? Sure you can
12:49 do whatever you need to do . I hope you're
12:53 watching because we may need more help up here .
12:55 This is tough , tough stuff . I tell you
12:58 . Fractions . She hasn't drawn like the spending .
13:03 Three going Mhm . Mhm . Mm . Mm hmm
13:17 . That's how she has very strong . Okay ,
13:19 so I see three equal parts there . Do you
13:22 all see the equal parts ? Uh huh . I
13:25 can't hear you . Okay . Mhm . So talk
13:31 us through it . Isabella , What are you doing
13:32 ? I was shaving third . Alright . Now ,
13:42 does that look like half anymore ? No , that
13:45 looks better than my eyes . Now tell me how
13:47 . Why ? That's two thirds he has . If
13:52 we had 15 , there's 33 There's three rows right
14:01 here . And , um , sensors , three rolls
14:06 . I know that is already split it into three
14:11 groups and just look at it . And how many
14:13 did you shade in ? And I was treated to
14:15 those roles . Awesome . Sarah , do you see
14:18 your mistake ? You see okay and see how easy
14:20 it is to make a mistake like that . But
14:22 we have to think we use our schema or background
14:24 knowledge and what we know . We know what a
14:26 half looks like . So right now we gotta think
14:29 . Oh , wait , wait , wait . Something's
14:30 wrong , because that looks like a half . So
14:32 I messed up somewhere , so we gotta go back
14:34 and think again . Two of three . I got
14:36 three equal parts shade into . Okay , We've got
14:39 to think about what We're doing . All right .
14:45 Yeah ,
Summarizer

DESCRIPTION:

4th grade math lesson on visualizing with fractions.

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4th Grade Visualizing with Fractions is a free educational video by Lumos Learning.

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