What is $\frac{9}{2}$ expressed as a decimal?
To convert a fraction to a decimal, I can divide the numerator by the denominator using long division or a calculator. I can also rewrite the fraction as a sum of a whole number and a proper fraction, and then convert each part to a decimal separately. I will use the second method, since it is easier to do mentally. I can rewrite $\frac{9}{2}$ as $4 + \frac{1}{2}$, because $4 \times 2 = 8$ and $9 - 8 = 1$. Then, I can convert $4$ to a decimal by writing it with a decimal point and a zero after it, like $4.0$. I can convert $\frac{1}{2}$ to a decimal by remembering that half of $1.0$ is $0.5$. Finally, I can add $4.0$ and $0.5$ to get the decimal equivalent of $\frac{9}{2}$. 