My Cat Has these 3 really big Knots in her

They are the size of accorns. I was wondering if anyone could help me by telling me how I can get them out.

In her fur? Use a seam ripper (gently though) you can also use bandage scissors to try and cut them out as long as you don't cut her skin. Otherwise a professional groomer or vet can help you.

Rosie had 4 small knots in her fur once, and i used the Bandage scissors like MA's just mentioned

Like Hissy said, be VERY careful not to cut her skin. It can be very hard to determine where the skin stops and the mat begins, if you've never done it before. I would use a comb to get between the mat and skin, then cut. Or, take her to a groomer or the vet and they can shave it out. When my cats mat, which can happen quickly, I just use a wide toothed metal comb to pull the mats out, then rub the area to eliminate any discomfort. They don't seem to mind that, if the mat isn't too big.

I have a little hand-held, battery-operated, travel razor/shaver whatever they are called and it works great for tough knots.

how did you go? did you get the knots out?