How do you actually come PM if you don’t have a party that can get a majority vote?
You convince a majority of the members of the House of Reps to agree to support you in passing bills required for operating the government (basically bills allowing them to spend money, also known as supply) and to support you if a motion of no confidence is put forward.
I expect they'll be back together in some form come next election, I can't see the Libs - let alone the Nationals - forming government in their own right.
I am curious as to what will happen in Queensland state level now the federal parties have split - will they split the LNP party there?