Powers of 10
The powers of 10 are easy to remember, because we use a base 10 number system.
For 10n with n a positive integer, just write a "1" with n zeros after it. For negative powers 10-n, write "0." followed by n – 1 zeros, and then a 1.
The powers of 10 are widely used in scientific notation, so it's a good idea to get comfortable with them.
Powers of 10 |
|
| 101 = 10 | 100 = 1 |
| 102 = 100 | 10-1 = 0.1 |
| 103 = 1000 | 10-2 = 0.01 |
| 104 = 10,000 | 10-3 = 0.001 |
105 = 100,000 (one hundred thousand) |
10-4 = 0.0001 (one ten thousandth) |
106 = 1,000,000 (one million) |
10-5 = 0.00001 (one hundred thousandth) |
107 = 10,000,000 (ten million) |
10-6 = 0.000001 (one millionth) |
108 = 100,000,000 (one hundred million) |
10-7 = 0.0000001 (one ten millionth) |
109 = 1,000,000,000 (one billion) |
10-8 = 0.00000001 (one hundred millionth) |
1010 = 10,000,000,000 (ten billion) |
10-9 = 0.000000001 (one billionth) |
Click here for more names for really big and really small numbers.
