（1）原式=1.3+16.1

                =17.4（2）原式=91.03+7.1

                =98.13

（3）原式=28.8-6.5

                =22.3（4）原式=29+17.4

                = 46.4

（5）原式=89.76+90.5

                =180.26

（6）原式=36.88-0.54

                =36.34