Subtracting Decimals - By tecmath
Transcript
| 00:0-1 | Good day . Welcome to the Tech Math channel . | |
| 00:02 | Don't be looking at in this video is how to | |
| 00:04 | subtract decimals . So Without much further Ado I'll give | |
| 00:07 | you an example of where we're doing this . So | |
| 00:09 | the example I'm going to use to our show how | |
| 00:11 | to do this is this 132 567 And we're going | |
| 00:19 | to take from this one 0.3 died . Okay . | |
| 00:24 | Yeah . We're subtracting any number from one another . | |
| 00:27 | But especially so with decimals , it's really , really | |
| 00:30 | important that we line up numbers are the same place | |
| 00:32 | together . So we're gonna write this . So these | |
| 00:34 | this one's on top of this one and we're gonna | |
| 00:37 | line these up . So units are above units and | |
| 00:39 | tens or above 10 . Well there's no tens but | |
| 00:41 | 10th or above tens and hundreds or above hundreds . | |
| 00:44 | And as well with these sort of decimals line up | |
| 00:47 | with one another as well . So we do this | |
| 00:50 | as well , look like this . So I'll start | |
| 00:52 | off with 32.5 67 Are we going to take away | |
| 01:00 | one point 39 And you're going to see the units | |
| 01:04 | lined up the decimals lineup , the 10th lineup and | |
| 01:08 | 100 slaughter . Okay , so we can start actually | |
| 01:12 | then subtracting there . So first off what I'm gonna | |
| 01:16 | do with this , I'm actually gonna put a zero | |
| 01:18 | here just in the minute when you're first doing these | |
| 01:20 | , I think it's really , really important when you | |
| 01:22 | do this is a good little step to put in | |
| 01:24 | this way you pat it out . Uh just so | |
| 01:26 | all of our numbers have the same link . So | |
| 01:29 | this has a number here with three decimal places . | |
| 01:32 | This only has two decimal place . I'm gonna put | |
| 01:34 | a zero there Just to avoid any little confusion . | |
| 01:37 | It's a seven take away zero is seven . Six | |
| 01:42 | take away nine . Now we can't do that because | |
| 01:45 | six is smaller than nine . So we must borrow | |
| 01:48 | one from over here . So five becomes a fall | |
| 01:52 | And one goes over here so it becomes 1616 take | |
| 01:56 | away nine . It's seven . There we go . | |
| 02:00 | To this attempts here . four take away three is | |
| 02:03 | 1 . The decimal place goes here To take away | |
| 02:06 | one is 1 and three take away nothing . three | |
| 02:10 | Take away . Well nothing is three . So We | |
| 02:14 | have an answer of 31.177 . That's pretty easy . | |
| 02:19 | Right ? I'll tell you what , I'll go through | |
| 02:21 | one more example of these uh just so you can | |
| 02:24 | pick these up . Okay ? So for example , | |
| 02:28 | I'll go through with this one . It's a slight | |
| 02:30 | variation to this one is where we're going to have | |
| 02:33 | a say 26 .4 and I'm going to take away | |
| 02:39 | 12 point three four . Okay . Now the way | |
| 02:46 | we do this is as follows . Okay , we | |
| 02:48 | get again we're gonna like them so everything lines up | |
| 02:50 | this this number really didn't work very well . Just | |
| 02:52 | fix it up there . So all right , everything | |
| 02:55 | . So again the tens line up , The units | |
| 02:58 | lined up the decimals lineup . The 10th line up | |
| 03:01 | And there's only one with hundreds . So let's do | |
| 03:03 | this . So 20 6.4 and I'm going to take | |
| 03:08 | away 12 point 34 And once again you're gonna notice | |
| 03:17 | , I'll put a little line under here that this | |
| 03:19 | one is one decimal place . This one is two | |
| 03:22 | decimal places . So I'm going to pad it out | |
| 03:23 | with an extra zero here . It's really really important | |
| 03:26 | to do this , especially where these numbers on top | |
| 03:28 | . So it's a good habit to get into . | |
| 03:30 | So we started we got zero takeaway for we can't | |
| 03:34 | do so we're gonna have to borrow one from here | |
| 03:36 | . So we have this becomes a three . This | |
| 03:38 | becomes a 1 10 take away four six three take | |
| 03:43 | away three zero . The decimal place goes there . | |
| 03:47 | six take away too is four . And to take | |
| 03:52 | my one it's one . So our answer is 14.06 | |
| 03:58 | . Hey that's the way you used to attract decimals | |
| 04:00 | . Future videos are gonna be looking at how to | |
| 04:02 | multiply decimals and divide decimals . Okay so I hope | |
| 04:05 | to see you then . See you . Bye . |
Summarizer
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Subtracting Decimals is a free educational video by tecmath.
This page not only allows students and teachers view Subtracting Decimals videos but also find engaging Sample Questions, Apps, Pins, Worksheets, Books related to the following topics.
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