# Powers of $10$

The powers of $10$ are easy to remember, because we use a base $10$ number system.

For ${10}^{n}$ 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 $10$ ${10}^{1}=10$ ${10}^{1}=1$ ${10}^{2}=100$ ${10}^{-1}=0.1$ ${10}^{3}=1000$ ${10}^{-2}=0.01$ ${10}^{4}=10,000$ ${10}^{-3}=0.001$ ${10}^{5}=100,000$ (one hundred thousand) ${10}^{-4}=0.0001$ (one ten thousandth) ${10}^{6}=1,000,000$ (one million) ${10}^{-5}=0.00001$ (one hundred thousandth) ${10}^{7}=10,000,000$ (ten million) ${10}^{-6}=0.000001$ (one millionth) ${10}^{8}=100,000,000$ (one hundred million) ${10}^{-7}=0.0000001$ (one ten millionth) ${10}^{9}=1,000,000,000$ (one billion) ${10}^{-8}=0.00000001$ (one hundred millionth) ${10}^{10}=10,000,000,000$ (ten billion) ${10}^{-9}=0.000000001$ (one billionth)

Click here for more names for really big and really small numbers .