1. (2020五上·绥滨期末) 口算。

0.05×0.8 =        3.5+ 3.5×3 =      12.55×0.8 =      1.5×0.6 =

4 ÷0.25 =          10÷0.01 =          0÷19.8 =            0.12 ×3 =