The sum $\frac{7}{10}+\frac{3}{100}+\frac{9}{1000}$ is equal to
(A) 0.937
(B) 0.9037
(C) 0.7309
(D) 0.739
(E) 0.0739
Solution 1

$$
\begin{aligned}
\frac{7}{10}+\frac{3}{100}+\frac{9}{1000} & =\frac{700}{1000}+\frac{30}{1000}+\frac{9}{1000} \quad \text { (using a common denominator) } \\
& =\frac{739}{1000} \\
& =0.739
\end{aligned}
$$

Solution 2

$$
\begin{aligned}
\frac{7}{10}+\frac{3}{100}+\frac{9}{1000} & =0.7+0.03+0.009 \quad \text { (converting each fraction to a decimal) } \\
& =0.739
\end{aligned}
$$

ANSWER: (D)

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