Do I Need to Work My Abs?

I find doing sit up, crunches and any isolation exercises for my abs boring because i could be spending my time doing real exercises like dead lifting and squatting which work your abs but should i be doing them all aswell? im 16 and weigh 86kg if this helps

Suggestion:

Great. It seems you are one of the very few that actually do core lifts. Deadlifting and squatting are GREAT and work out so many parts. They both work out the core quite well, but if you really want you can add in an extra exercise. I would suggest doing weighted ab work. You can do sit-ups with a weight (barbell works best) in your hand. Start with as much as you can and gradually work your way up. Also you can try to use the machine that work out your triceps..you know the ropes. Go on your knees then do pulldowns with those..they really helped make my abs stronger.