Exactly. And the key part of Roth's reply

"I didn't ask who gave the order -- because it had nothing to do with business!"

translated into his telling Michael not to ask him who ordered the hit on Pentangeli. He was letting Michael know that he knew that Michael ordered the hit on Moe Green but never questioned him on it and therefore Michael knowing that Roth ordered the hit on Frankie should not be questioning him about it because it was strictly business.