Can you replace the 240v plug on my 240v mitre saw with a 110v plug and run it off a 110v transformer?

Changing the plug will not change the power needed to run the saw. If the saw has a dual voltage motor then a wiring change can be done to switch the saw from 240 to 110 volts. If it is not a dual voltage system then the saw must be fed with 220 volts.