Simplify the following expression:
$$[3.75 + \frac{4}{5}] - [3.5 - \frac{8}{20}]$$​

Correct option is A

Given
Expression = $$[3.75 + \frac{4}{5}] - [3.5 - \frac{8}{20}]$$​​
Solution
​$$\frac{4}{5} = 0.8 \\\ \\\frac{8}{20} = \frac{4}{10} = 0.4 \\\ \\$$​​

Substitute these into the expression:
= [3.75 + 0.8] - [3.5 - 0.4]
= 4.55 - 3.1
= 1.45
Final Answer
So the correct answer is (a)