0.7683 + 0.369 + 0.05 + 0.8 = ?

Answer: Option A

Explanation:

$$\begin{aligned} 6.\overline{46} = 6 + 0.\overline{46} = 6 + \frac{46}{99} = 6\frac{46}{99} = \frac{640}{99} \end{aligned}$$

Answer: Option D

Explanation:

As per given equation we can solve like this :

$$\begin{aligned} = \frac{8 - 2.8}{1.3} \\ = \frac{5.2}{1.3} = \frac{52}{13} \\ = 4 \end{aligned}$$

Answer: Option A

Answer: Option B

Answer: Option B

Explanation:

Clearly after decimal 6 digits should be there.