Question

If we add $\frac{-7}{10}and\frac{1}{-10}$, we get

• A. $\frac{8}{10}$
• B. $\frac{-6}{10}$
• C. $\frac{6}{10}$
• D. $\frac{-8}{10}$

Answer 1

The correct option is D

$\frac{-8}{10}$

$\frac{-7}{10}+\frac{1}{-10}$

change denominator to 10.

$$\begin{gathered} \frac{1\times (-1)}{-10\times (-1)}=\frac{-1}{10} \\ \frac{-7}{10}+\frac{-1}{10} \\ =\frac{-7-1}{10} \\ =\frac{-8}{10} \end{gathered}$$

Hence, option D is correct.