Question

直接写出得数． 4 5 ×5=	2 3 × 3 5 =	2- 3 4 =	2+ 3 4 =	1 2 × 3 4 ÷ 1 2 × 3 4 =
0× 6 7 =	5 8 × 4 15 =	1 3 - 1 4 =	8 9 ÷4=	1÷ 2 5 =
0÷ 1 8 =	4 7 ÷ 7 4 =	12÷ 1 6 =	5 9 ÷ 1 3 =	1÷6÷3=

Answer 1

考点：分数的四则混合运算,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．

解答：

解： 4 5 ×5=4	2 3 × 3 5 = 2 5	2- 3 4 =1 1 4	2+ 3 4 =2 3 4	1 2 × 3 4 ÷ 1 2 × 3 4 = 9 16
0× 6 7 =0	5 8 × 4 15 = 1 6	1 3 - 1 4 = 1 12	8 9 ÷4= 2 9	1÷ 2 5 = 5 2
0÷ 1 8 =0	4 7 ÷ 7 4 = 16 49	12÷ 1 6 =72	5 9 ÷ 1 3 = 5 3	1÷6÷3= 1 18

点评：本题关键是明确分数乘除法的计算法则．