BRAINCAKEPower Prefixes
| tera | 1012 |
| giga | 109 |
| mega | 106 |
| kilo | 103 |
| deci | 10-1 |
| centi | 10-2 |
| milli | 10-3 |
| micro | 10-6 |
| nano | 10-9 |
| pico | 10-12 |
| femto | 10-15 |
A prefix is placed in front of a unit to show that the unit is multiplied by a power of ten. It lets us write very large or very small values without long strings of zeros, for example 3 km instead of 3000 m, or 25 mA instead of 0.025 A.
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