3.25×1.8=
3.25×0.18=
325×0.18=
0.325×18=
7.2 ÷ 0.67.2× 0.9
①3.22÷1.4-0.98
②15.52-1.6×5
③(80+0.5)÷1.25
④59.4-23.1÷0.7