If the carpenters blade is 1/8 inch you need to subtract the amount of the blade, so you subtract 1/8 three times from the total amount of wood. You should get 25/8 or 3 1/8. You will then divide that answer by four because, there will be four boards left at the end of the cutting. The quotient you should find will be 25/32, so that is the answer.
