Question

7 9 × 3 7 =	240÷ 3 4 =	3 1 2 ×5=	2- 1 3 =
75÷ 5 6 =	1 8 + 1 9 =	8 13 ÷ 3 4 =	24× 8 3 =

Answer 1

分析：本题根据分数乘法、除法、加法及减法的运算法则计算即可．

解答：解：

7 9 × 3 7 = 1 3	240÷ 3 4 =320	3 1 2 ×5= 35 2	2- 1 3 =1 2 3
75÷ 5 6 =90	1 8 + 1 9 = 17 72	8 13 ÷ 3 4 = 32 39	24× 8 3 =64

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与约分．