Converting to Scientific Notation | MathHelp.com - By MathHelp.com
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| 00:0-1 | To write a number such as 642,000 in scientific notation | |
| 00:06 | . First write a decimal point in the number so | |
| 00:09 | that there's only one digit to the left of the | |
| 00:11 | decimal point . So here we have 6.42000 . Notice | |
| 00:20 | that there is now only one digit to the left | |
| 00:23 | of the decimal point . Next count the number of | |
| 00:26 | places that we would need to move the decimal point | |
| 00:28 | in order to get back to the original number , | |
| 00:31 | We would need to move the decimal .1 2345 places | |
| 00:37 | to the right to get back to the original number | |
| 00:40 | . This means that we need to multiply 6.42000 times | |
| 00:46 | 10 to the 5th power . Notice that our exponent | |
| 00:51 | is positive . That's because we needed to move the | |
| 00:54 | decimal point to the right to get back to the | |
| 00:56 | original number . So 642,000 can be written in scientific | |
| 01:01 | notation as 6.42000 times 10 to the fifth power , | |
| 01:08 | or 6.42 times 10 to the fifth power |
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