$$50000$$ --- fifty thousand --- $$5\times 10000$$
$$41000$$ --- forty one thousand ---$$4\times 10000+1\times 1000$$
$$47300$$ --- forty seven thousand three hundred ----$$4\times 10000+7\times 1000+3\times 100$$
$$57630$$ --- fifty seven thousand six hundred thirty ----$$5\times 10000+7\times 1000+6\times 100+3\times 10$$
$$29485$$ --- twenty nine thousand four hundred eighty five ----$$2\times 10000+9\times 1000+4\times 100+8\times 10+5\times 1$$
$$29085$$ --- twenty nine thousand eighty five ---$$2\times 10000+9\times 1000+8\times 10+5\times 1$$
$$20085$$ - twenty thousand eighty five ----$$2\times 10000+8\times 10+5\times 1$$