Question

口算

6× 5 12 =	3 5 ÷6=	4 5 ÷ 5 4 =	1÷4× 1 4 =	1÷ 1 5 =
1 3 ×0.15=	3 8 ÷ 5 2 =	3 5 ÷ 3 8 =	1 2 × 1 3 ÷ 1 2 × 1 3 =	0÷5× 3 5 =

Answer 1

考点：分数乘法,分数除法

专题：运算顺序及法则

分析：根据分数乘除法的计算法则计算即可求解．注意

1

2

×

1

3

÷

1

2

×

1

3

变形为（

1

2

÷

1

2

）×（

1

3

×

1

3

）计算．

解答： 解：

6× 5 12 =2 1 2	3 5 ÷6= 1 10	4 5 ÷ 5 4 = 16 25	1÷4× 1 4 = 1 16	1÷ 1 5 =5
1 3 ×0.15=0.05	3 8 ÷ 5 2 = 3 20	3 5 ÷ 3 8 = 8 5	1 2 × 1 3 ÷ 1 2 × 1 3 = 1 9	0÷5× 3 5 =0

点评：考查了分数乘除法，关键是熟练掌握计算法则正确进行计算．