0.6×0.5=
0.125×8=
3.5×0.2=
0.9×0.8=
4.5×0.2=
1.5×0.4=
理由:
算一算,比一比.
3.3×6.9=22.77
3.33 ×66.9=222.777
3.333×666.9=
......
88.83÷9=9.87
88.884÷9=9.876