Question

口算题 2 3 × 6 7 =	2 5 ÷ 3 10 =	4 5 + 1 10 =	4 9 - 1 3 =	9 10 - 2 5 =
2 5 + 1 2 =	3 7 - 1 6 =	9 10 × 5 7 =	5 12 ÷ 5 6 =	3 4 + 2 3 =

Answer 1

考点：分数乘法,分数的加法和减法,分数除法

专题：运算顺序及法则

分析：本题根据分数的乘法、除法、加法与减法的运算法则计算即可．

解答： 解：

2 3 × 6 7 = 4 7	2 5 ÷ 3 10 = 4 3	4 5 + 1 10 = 9 10	4 9 - 1 3 = 1 9	9 10 - 2 5 = 1 2
2 5 + 1 2 = 9 10	3 7 - 1 6 = 11 42	9 10 × 5 7 = 9 14	5 12 ÷ 5 6 = 1 2	3 4 + 2 3 = 17 12

点评：完成分数乘除法时，要注意约分．完成分数加减法时要注意通分、约分．