2.8×0.92.8 3.69÷0.93.69
8.1÷0.0981÷0.9 3.8÷0.10.38×100
8.333…
1.85÷1.021.85
2.85÷0.62.85×0.6
1.35÷0.231.35
4.8÷0.014.8×100
5.7÷4.951
18÷20×3.75 1.45× (7.2÷2.4)
0.78+0.22÷5 (7.5-2.3×0.4)÷0.01
①6.4×2.5×1.25
②8.5×98%
③÷4+×
④×