2) 68.46<68.54

   0.35<0.357

   4.56>0.56

   415.028>415.026

   7.291>7.2

    0.3=0.3

3) (25.88-5.37)+4.4=20.51+4.4=24.91

    320.57-119.41+47.81=201,16+47.81=248,97