720.81+10.4=

7.062.4-5.7=

50.41.9-1.8=

3.760.25+25.8=

0.75180.15=

2.070.230.45=

21.360.8-12.9=

7.28+3.22.5=

1.080.80.27=

2.050.82+33.6=

44.280.94.1=

9.07-22.783.4=

2.70.83.4=

12.33.1+5.6=

4.93.2-2.5=

36.4-6.45.3=

（1.8-1.5）15=

9.80.6-1.21.2=

3.874+6.13=

16-2.546=

213.60.80.3=

16.065.5 1.7=

42（5.250.25）=

6.480.1210.8=