Easy Addition trick to add large numbers instantly! - By tecmath
Transcript
| 00:0-1 | Can you add these three numbers in Under five seconds | |
| 00:03 | . 367 plus 728 plus 132 . You have five | |
| 00:09 | seconds , go for it . Time's up . Did | |
| 00:16 | you get the following answer ? 1,227 if you did | |
| 00:21 | . Congratulations . Well done . That is the correct | |
| 00:23 | answer . If not . Well I'm a little bit | |
| 00:26 | disappointed , I must say , but that's okay because | |
| 00:28 | for the next couple of minutes I'm going to show | |
| 00:29 | you the best strategy on how to mentally add these | |
| 00:32 | sorts of problems . So first off , the most | |
| 00:34 | important thing we're adding mentally is we're going to be | |
| 00:37 | adding not in the usual way that you've probably been | |
| 00:39 | taught what we started the right , adding units first | |
| 00:41 | and then adding the tens , then finally adding the | |
| 00:43 | hundreds digits , Moving from right to left instead . | |
| 00:46 | What we're going to be doing is the opposite . | |
| 00:48 | We're going to be adding from left to right , | |
| 00:50 | starting with the most significant figures . First the hundreds | |
| 00:54 | Then adding the 10's and then the units . As | |
| 00:56 | I said , moving from left to right , I | |
| 00:59 | think the easiest way to explain this is for me | |
| 01:01 | to show you . So let's start out with an | |
| 01:03 | easier example . We will get back to this one | |
| 01:05 | . I promise . So , a nice easy example | |
| 01:08 | to start off with 589 and this will add 637 | |
| 01:13 | . As I said , we'll be starting on the | |
| 01:15 | left adding the most significant figures first . So we're | |
| 01:18 | starting with the hundreds and moving across to the right | |
| 01:22 | , So 600 plus 500 is 1100 plus 80 is | |
| 01:27 | 1180 plus 30 is 1210 plus 9 . 1219 plus | |
| 01:35 | seven is our answer . 1226 easy . So what | |
| 01:41 | you can see what we're doing is we're progressively going | |
| 01:44 | to the right as we had , which allows us | |
| 01:45 | to think of the problem more in the order that | |
| 01:47 | it's going to be answered . Giving us our most | |
| 01:49 | significant figures first . You also may notice that I've | |
| 01:52 | really put in more steps than we need . We | |
| 01:54 | could have really started by just going 580 plus 600 | |
| 01:58 | is 1180 plus 30 Is 1210 plus 16 . 1226 | |
| 02:06 | . So easy adding left to right , which is | |
| 02:08 | the key to mentally adding numbers successfully . With practice | |
| 02:11 | , you'll be slamming these sorts of problems out of | |
| 02:13 | the park . So what about to give a few | |
| 02:15 | that you can try ? We'll start with an easy | |
| 02:17 | example . It's good to work your way up . | |
| 02:19 | So let's try 1st . 784 plus 321 . The | |
| 02:25 | second one for you a little bit harder . 482 | |
| 02:28 | plus 736 . You'll be right now . Let's get | |
| 02:33 | funky for the third one will start adding three numbers | |
| 02:36 | 927 plus 740 plus 278 . Finally , let's get | |
| 02:44 | back to the original example and give it a go | |
| 02:46 | . It was 367 plus 728 plus 132 . And | |
| 02:52 | I reckon you'll be able to do that in close | |
| 02:54 | to 1 to 5 seconds but no pressure there . | |
| 02:57 | Anyway , pause the video if you'd like to give | |
| 02:59 | these ago or live dangerously and answer them as I | |
| 03:02 | go through them . By the way , if you | |
| 03:03 | like this trick , do me a solid , press | |
| 03:05 | down on the like button and leave a comment and | |
| 03:07 | please let me know if you found this trick useful | |
| 03:09 | anyway . Too late to pause now let's get to | |
| 03:11 | these answers and see how good you are . So | |
| 03:14 | first off the easiest 1 , 784 plus 321 . | |
| 03:19 | So 700 plus 300 . Now look , I'm not | |
| 03:22 | going to say plus every time I'm just going to | |
| 03:23 | keep a running tally . Okay ? So 701,000 1081101105 | |
| 03:32 | is our answer . The next one 1,101,181,210 . did | |
| 03:43 | you okay with that one ? Like I said , | |
| 03:46 | this is a really quick way of mentally adding in | |
| 03:48 | your head . A third example , we're going to | |
| 03:51 | be adding three numbers together . So let's just go | |
| 03:53 | through and do this . 1,601,801,861,930 1937 and our answer | |
| 04:04 | 1945 how'd you go ? You get three for three | |
| 04:09 | . Getting close to five seconds . I hope so | |
| 04:12 | . So now back to our original example . See | |
| 04:15 | how fast you can add . We have 1,101,081,210 , | |
| 04:26 | Anyway , that in my opinion is the best way | |
| 04:28 | of mentally adding numbers together . What do you think | |
| 04:31 | ? Do you know another way ? Maybe let me | |
| 04:33 | know in the comments once again , if you like | |
| 04:36 | this trick , please push down the like button , | |
| 04:38 | subscribe even become a patron . The link is in | |
| 04:40 | the description below . Anyway . Thank you for watching | |
| 04:43 | . And remember fish are friends , not Food Boy | |
| 00:0-1 | . |
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Easy Addition trick to add large numbers instantly! is a free educational video by tecmath.
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