Question

口算下面各题．

(1)0.4×0.4=

(2)7.8×100=

(3)0.14×0.2=

(4)0.04×2.1=

(5)5.3×0.1=

(6)0.6×0.03=

(7)0.3×0.8=

(8)0.42×10=

(9)0.04×0.6=

Answer 1

答案：0.16;780;0.028;0.084;0.53;0.018;0.24;4.2;0.024