2.5×180= 2.5×1.8= 54÷1.5= 54÷150=
1×0.941 4.25×1.34.25 1.5×2815×2.8
3.68×03.68 7.68×1.987.68 1.2÷0.81.2×0.8
0.4×0.6= 1.2×0.4= 2.3×0.5=
3.1×0.02= 0.32×0.8= 3.7×0.6=
5.7×0.9= 8.5×0.7= 1.8×0.3=