Question

口算小能手． 0.1÷0.01=	8.4÷4.2=	3.5×0.1=
0.35×0.2=	0.84÷0.7=	8-2.84=
0.32+1.68=	1.25×0.8=	0.25×0.8=

Answer 1

分析：根據(jù)小數(shù)乘除法口算的方法求解即可．

解答：解：

0.1÷0.01=10	8.4÷4.2=2	3.5×0.1=0.35
0.35×0.2=0.07	0.84÷0.7=1.2	8-2.84=5.16
0.32+1.68=2	1.25×0.8=1	0.25×0.8=0.2

點評：本題屬于基本的計算，在平時都積累經(jīng)驗，逐步提高運算的速度和準確性．