Teaching Mathematics | MathHelp.com - By MathHelp.com
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| 00:0-1 | To find the greatest common factor or GCF of eight | |
| 00:04 | and 18 . We begin by finding all of the | |
| 00:07 | factors of each number . To find the factors of | |
| 00:10 | eight , We know that eight divided by one is | |
| 00:14 | 8 , so one and eight are factors eight divided | |
| 00:20 | by two is 4 , So two and 4 are | |
| 00:25 | factors . However , if we continue to divide eight | |
| 00:29 | by 345 and so on , we won't find any | |
| 00:33 | new factors . So the factors of eight R one | |
| 00:37 | , two , four and eight . Now , let's | |
| 00:45 | find the factors of 18 , 18 divided by one | |
| 00:51 | is 18 . So one and 18 are factors 18 | |
| 00:57 | divided by two is nine , so two and nine | |
| 01:02 | are factors 18 divided by three is 6 , so | |
| 01:08 | three and 6 are factors . However , if we | |
| 01:12 | continue to divide by 456 and so on , we | |
| 01:16 | won't find any new factors . So the factors of | |
| 01:19 | 18 are one , two , three , six , | |
| 01:26 | nine and 18 . Now that we have our lists | |
| 01:35 | of factors to find the greatest common factor , we | |
| 01:38 | simply find the largest number that is shared by the | |
| 01:41 | two lists notice that our lists share a one , | |
| 01:44 | but the largest number they share is a two , | |
| 01:49 | So the greatest common factor , or GCF . of | |
| 01:53 | eight and 18 is too . Mhm . |
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