When you’re crosscutting on a table saw, set the cut length with a block clamped to the fence. Don’t ever use the fence directly to avoid getting a board kicked back right at you. Instead, clamp a block of wood to the fence before the blade. Then the end of the board will be free of the fence during and after the cut. If you make a block that’s exactly 1 in. thick, you can set the fence scale at 1 in. greater than the length you’re after. No tricky fractions involved.