You won't be able to use the 68882 on your LC475. The card itself will work fine, but the FPU won't.
As for the Classic, while there was a (rare) 68882 card available for the Classic II, there was never an FPU upgrade for any of the 68000 Macs.
As for the Classic, while there was a (rare) 68882 card available for the Classic II, there was never an FPU upgrade for any of the 68000 Macs.