Confederate States of America 100 dollars and 5 dollars

I discovered few of these papers in a very old wooden box hidden under a wooden floor house while remodeling new floors.... Now at first I thought these are toy paper money and when I showed it to my brother, that when I realized it an oldschool paper money. And there are 8 of 100 dollars and 3 of 5 dollars, one of 100 dollars ripped in half because it very old they rips easy..... Now is it true that when these papers loses value if ripped or folds? And how much these worth too? I found few websites but doesn't explain much, one talk about these are counterfeit or fake?