a) $45 / 6+62 / 3$

Step 1 ：First, perform the division operations: \(\frac{45}{6} = 7.5\) and \(\frac{62}{3} \approx 20.67\)

Step 2 ：Next, add the results: \(7.5 + 20.67 = 28.17\)

Step 3 ：\(\boxed{28.17}\) is the final answer.