Сусловным предложением. определите залог и время у сказуемого. 1)it would be rether difficult to predict the place where the moon will be at any particular time without computers. 2) one should remember all these rules, while solving a problem.

1) It would be (Future-in-the-Past Simple, Active Voice) rather difficult to predict the place where the moon will be (Future Simple, Active Voice) at any particular time without computers.
2) One should remember (Modal, Active Voice) all these rules, while solving a problem.