Dividing Mixed Numbers | MathHelp.com - By MathHelp.com
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| 00:0-1 | to divide mixed numbers such as three and an eighth | |
| 00:03 | divided by 4.5 1st . Right ? The mixed numbers | |
| 00:07 | as improper fractions . So here we can write three | |
| 00:11 | and an eighth as 25 eight and we can write | |
| 00:16 | 4.5 as nine halves . So we have 25/8 divided | |
| 00:22 | by 9/2 . If you need to review how to | |
| 00:26 | write a mixed number as an improper fraction , you | |
| 00:29 | may need to stop here and go back to the | |
| 00:31 | lesson . That covers that concept . Now remember that | |
| 00:35 | dividing by a fraction is the same thing as multiplying | |
| 00:38 | by the reciprocal of the fraction . In other words | |
| 00:42 | we can rewrite 25/8 divided by 9/2ves As 25/8 times | |
| 00:51 | 2/9 . Next we cross cancel the eight and to | |
| 00:57 | to get four and one and multiply across the numerator | |
| 01:02 | and across the denominators 25 times one is 25 And | |
| 01:09 | four times 9 is 36 . So three and an | |
| 01:14 | eighth divided by 4.5 written in lowest terms is 25 | |
| 01:19 | 36 . Yeah . |
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