2.15小时=小时分.
1.8×0.5=
49×0.2=
10÷2.5=
0.83÷0.1=
0.42÷0.7÷0.6=
0.44÷2.2=
0.6×0.5=
1.25×8=
0.24×8.5=
0.56÷32=
5.5×17.3+2.7×5.5
1.25×(6.2﹣5.9)×80
1.5×99
4.6×(1﹣0.25)+0.75×5.4.