A user is preparing an example to show a language model how to solve multi-step word problems. The goal is to help the model learn to show its work clearly. Below are two versions of the example's solution for the problem: 'If apples cost $2 each and oranges cost $1.50 each, what is the total cost of 3 apples and 5 oranges?'

Version A: 'First, we find the total cost of the apples, which is 3 apples times $2 per apple, so that's $6. Then we find the cost of the oranges, which is 5 oranges times $1.50 per orange, which equals $7.50. Finally, we add the two costs together, $6 plus $7.50, to get the total cost of $13.50.'

Version B: 'First, we calculate the cost of the apples and oranges separately. Then, we add them to find the total cost. ≪Cost of apples = 3 * $2.00 = $6.00; Cost of oranges = 5 * $1.50 = $7.50; Total cost = $6.00 + $7.50 = $13.50≫ The total cost is $13.50.'

Analyze both versions. Which version is structured more effectively to teach the model a clear reasoning process, and why?

Formatting a Solution for Model Training

A developer is creating an example to teach a language model how to solve financial problems. The goal is to make the reasoning process explicit by enclosing the detailed mathematical steps within special markers (≪...≫), separating them from the narrative explanation. Which of the following options best applies this formatting principle for the problem: 'Calculate the simple interest on a principal of $1000 at an annual rate of 5% for 3 years.'?