Question

口算题

3.5×0.1=	1 2 ×4=	3.6÷0.09=	2 3 ×6=	200×0.04=
9× 1 3 =	12÷1.2=	16× 1 2 =	1.3×0.5=	1 2 × 1 3 =
0.42÷0.6=	1 4 × 2 3 =	3.2×0.5=	5 7 × 2 5 =	0.21×0.3=
3 4 × 4 9 =	2.5×1.4=	2 5 × 10 3 =	5.5÷11=	1 3 × 3 4 =

Answer 1

考点：分数乘法,小数乘法

专题：运算顺序及法则

分析：根据小数乘除法以及分数乘除法计算的方法求解．

解答： 解：

3.5×0.1=0.35	1 2 ×4=2	3.6÷0.09=40	2 3 ×6=4	200×0.04=8
9× 1 3 =3	12÷1.2=10	16× 1 2 =8	1.3×0.5=0.65	1 2 × 1 3 = 1 6
0.42÷0.6=0.7	1 4 × 2 3 = 1 6	3.2×0.5=1.6	5 7 × 2 5 = 2 7	0.21×0.3=0.063
3 4 × 4 9 = 1 3	2.5×1.4=3.5	2 5 × 10 3 = 4 3	5.5÷11=0.5	1 3 × 3 4 = 1 4

点评：本题属于基本的计算，在平时都积累经验，逐步提高运算的速度和准确性．