1.2+1.3=2.55.11+3.24=8.3556.123+321.65=377.44411.78+31.22=4321.12+12.21=33.3356.12-32.12=2431.345-27.345=478.99-21.44=57.5523.479-0.00012=23.478880.7365383-0.2343272=0.5022111
和整数加减法基本相同
具体点!!!