Resistor has no polarity.
The resistance you read is your multimeter lead resistance.
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OK. So when you touch the DMM's RED probe to the BLACK probe you see 0.6 Ohms....This means when you measure, you have to minus 0.6 form what is seen on the display........Then if it is 0.2....you should see 0.8.....minus 0.6 and you have 0.2.
That's why some multimeters have a button that says REL on them ... clean the leads of your multimeter (ideally use some isopropyl alcohol, but something abrasive works as well, basically to remove whatever oxides and crap is on the leads tips). Then press REL and now the multimeter should ignore the resistance of the wires in your leads. You should get a fairly good measurement of resistance from now on.
You'd have to use the REL button every time, most multimeters don't have memory to keep track of it.
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