# What is the order of magnitude of 1000?

Because we use the decimal system, we use $10$ as the base for the order of magnitude. There are 3 ways to solve this.
The first (easiest) way to to move the decimal point to the right of the most significant digit, in this case, the $1$. If you are moving the decimal point left, the order of magnitude is positive; if moving right, the order of magnitude is negative.
The second way is to take ${\log}_{10}$, or simply $\log$ of the number, so $\log 1000 = 3$.
The third way is to convert the number into scientific notation. The order of magnitude is the power used. So for a different example: $836824 = 8.36824 \times {10}^{5}$. The order of magnitude is $5$.