Fraction division trick - divide fractions instantly! - By tecmath
Transcript
| 00:0-1 | Good day . Welcome to the Tech Math channel in | |
| 00:01 | this video . What are we going to have a | |
| 00:03 | look at what We're going to have a look at | |
| 00:04 | dividing fractions . The trick for doing this instantly . | |
| 00:07 | So how fast can you do the following 3/5 divided | |
| 00:11 | boy 2/3 . You should have your answer straight away | |
| 00:16 | . Now look , if you got this answer of | |
| 00:18 | nine tense , congratulations , you got the correct answer | |
| 00:21 | . If I'm going to show you how you can | |
| 00:23 | divide fractions into one another that quickly . Okay . | |
| 00:27 | And the way we do this is fairly simple . | |
| 00:29 | I'll get rid of our answer here and I'll show | |
| 00:31 | you how I went about working out the first number | |
| 00:33 | . The top number of my fraction . I'll draw | |
| 00:36 | a line for the separating the top of the bottom | |
| 00:38 | number . My fresh the first number I did is | |
| 00:41 | I just multiplied These two numbers together . These three | |
| 00:44 | in the street . The top left number by the | |
| 00:46 | bottom , right number here . So three times three | |
| 00:49 | it's not . Then what I did is with the | |
| 00:52 | remaining numbers , I multiply those to get the bottom | |
| 00:55 | number five times 2 is ted My answer 9/10 . | |
| 01:00 | And so it's a really , really simple way of | |
| 01:03 | dividing one , fresh into another . You do this | |
| 01:06 | butterfly method where you start with the upper left wing | |
| 01:10 | first and then move down to the bottom number . | |
| 01:12 | And that's the way I do usually remember doing it | |
| 01:14 | . Start at the top , go to the bottom | |
| 01:16 | and you're going diagonally across . So what about I | |
| 01:20 | give you a question and you give it a go | |
| 01:21 | . Give me a couple of questions . So here | |
| 01:23 | you go . These . It's a great little trick | |
| 01:25 | , isn't it ? A quarter Divided by 2/3 . | |
| 01:31 | All right . So what's the answer here ? Start | |
| 01:35 | at the top , started that top bit , one | |
| 01:37 | time three Is three . That's the top number . | |
| 01:41 | The numbers that we have now . So we've done | |
| 01:43 | the one times three . We have two times four | |
| 01:46 | which is eight . Our answer . 38 since you | |
| 01:49 | get 3/8 . What about one last question here ? | |
| 01:53 | What about we do a bit of a harder one | |
| 01:56 | . 4/5 divided by a half . It's not hard | |
| 02:02 | at all , is it ? It's exactly the same | |
| 02:04 | . Okay . Four times two is eight . one | |
| 02:07 | times 5 is five 8/5 . Now look you can | |
| 02:11 | simplify this further divided by five is one with three | |
| 02:14 | left over . We put it over 51 and 3/5 | |
| 02:18 | . Hi . That is the trick on how you | |
| 02:21 | divide one decimal one , decimal 1 fraction into the | |
| 02:26 | other . Okay thanks for watching . See you next | |
| 02:28 | time . |
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