{"id":1062,"date":"2015-11-07T07:00:27","date_gmt":"2015-11-07T07:00:27","guid":{"rendered":"http:\/\/race4job.com\/blog\/?p=1062"},"modified":"2015-11-07T07:00:27","modified_gmt":"2015-11-07T07:00:27","slug":"maths-tricks-and-shortcuts-6","status":"publish","type":"post","link":"https:\/\/www.race4job.com\/blog\/maths-tricks-and-shortcuts-6\/","title":{"rendered":"Maths Tricks and Shortcuts"},"content":{"rendered":"

The 11 Times Trick<\/span><\/strong><\/p>\n

We all know the trick when multiplying by ten \u2013 add 0 to the end of the number, but did you know there is an equally easy trick for multiplying a two digit number by 11? This is it:<\/p>\n

Take the original number and imagine a space between the two digits (in this example we will use 52:<\/p>\n

5_2<\/p>\n

Now add the two numbers together and put them in the middle:<\/p>\n

5_(5+2)_2<\/p>\n

That is it \u2013 you have the answer: 572.<\/p>\n

<\/span>If the numbers in the middle add up to a 2 digit number, just insert the second number and add 1 to the first:<\/p>\n

9_(9+9)_9<\/p>\n

(9+1)_8_9<\/p>\n

10_8_9<\/p>\n

1089 \u2013 It works every time<\/p>\n

2. Quick Square<\/span><\/strong><\/p>\n

If you need to square a 2 digit number ending in 5, you can do so very easily with this trick. Mulitply the first digit by itself + 1, and put 25 on the end. That is all!<\/p>\n

252<\/sup> = (2x(2+1)) & 25<\/p>\n

2 x 3 = 6<\/p>\n

625<\/p>\n

3. Multiply by 5<\/span><\/p>\n

Most people memorize the 5 times tables very easily, but when you get in to larger numbers it gets more complex \u2013 or does it? This trick is super easy.<\/p>\n

Take any number, then divide it by 2 (in other words, halve the number). If the result is whole, add a 0 at the end. If it is not, ignore the remainder and add a 5 at the end. It works everytime:<\/p>\n

2682 x 5 = (2682 \/ 2) & 5 or 0<\/p>\n

2682 \/ 2 = 1341 (whole number so add 0)<\/p>\n

13410<\/p>\n","protected":false},"excerpt":{"rendered":"

The 11 Times Trick We all know the trick when multiplying by ten \u2013 add 0 to the end of the number, but did you know there is an equally easy trick for multiplying a two digit number by 11? This is it: Take the original number and imagine a space between the two digits […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1062","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t