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509 - 45 ____
It is: 509+10 = 519
HAHAHA. No. 509 divided by 4 = 127.25
turn the 409 into 400
so you have the numbers 7 29/80 multiply 80 and 7 and when you get that answer which would be 480 add 29 and that would be 509 after wards divide 509 over 80 80/509 and there is your answer. Hope it helps! :)