1, двойной
яма!
double bbbb = 0.045;
String bbb = bbbb.toStringAsFixed(2);
print(bbb); //0.04
double bbbb = 0.055;
String bbb = bbbb.toStringAsFixed(2);
print(bbb); //0.06
double bbbb = 0.0455;
String bbb = bbbb.toStringAsFixed(2);
print(bbb); //0.05