When carpenter needs to cut down a piece of wood that is 9 feet long to 1.31 feet what is the measurement of the left over piece?

To find the length of the leftover piece of wood after cutting down a 9-foot piece to 1.31 feet, subtract the cut length from the original length. So, 9 feet - 1.31 feet equals 7.69 feet. Therefore, the measurement of the leftover piece is 7.69 feet.