How do you write 213 in scientific notation?

Aug 2, 2018

$2.13 \times {10}^{2}$

Explanation:

Move the decimal point two places to the left so that there is only one digit to the left of the decimal point.
Then multiply by $100$ or ${10}^{2}$ so that the value of the expression remains the same.

Aug 2, 2018

$2.13 \cdot {10}^{2}$

Explanation:

When we write numbers in scientific notation, we want one digit before the decimal point.

In our case, we must loop it two times to the left. The number of times we loop it is our exponent, and looping it left makes it positive. Thus, we have

$2.13 \cdot {10}^{2}$

Hope this helps!