其它
Fill in the blank:~\uline{~~~~~~~~~~}~is $$4$$ tens $$5$$ ones greater than $$2$$ tens $$7$$ ones. 
Overseas Competition->Knowledge Point->Number Theory Modules
$$4$$ tens $$5$$ ones: $$45$$  $$2$$ tens $$7$$ ones: $$27$$  Greater than: $$45 + 27 = 72$$ 