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=
①0.28×0.37=
②4.8×3.6=
③451×0.12=
④20.6×0.52=
⑤0.527×0.25=
⑥3.2×0.47=