Question

直接写出得数：

2 5 ×2=	6× 1 4 =	1 2 × 3 8 =	7 9 ×1=
3 11 × 22 9 =	5 12 + 1 3 =	4 7 × 1 8 =	2 3 - 5 12 =

Answer 1

分析：依据分数乘法和加、减法的计算方法，进行解答即可，能约分的先约分再计算．

解答：解：

2 5 ×2= 4 5	6× 1 4 = 3 2	1 2 × 3 8 = 3 16	7 9 ×1= 7 9
3 11 × 22 9 = 2 3	5 12 + 1 3 = 3 4	4 7 × 1 8 = 1 14	2 3 - 5 12 = 1 4

点评：此题主要考查分数除法和加减法的计算方法的灵活应用．