-5/6=-0,8(3)
19/8=2,375
√5,64=2,3748..........
-5/7=-0,7142........
√30=2,34034.............
√11/12=0,978481.........
√12/13=0,980188............
√13/14=0,9816.........
√15/16=0,9682........
a) -1,2; -1; -5/6; -0,83; -5/7; √30; 2,37; √5,64; 19/8;
b) √15/16; √11/12; √12/13; √13/14