Question

直接写出得数． 1 3 ÷4=	1 5 - 1 6 =	5 12 × 24 25 =	6 7 - 5 14 =
5 6 + 1 2 =	2 3 + 4 5 =	13÷ 7 3 =	7 15 × 5 6 =
8 11 × 22 23 =	7 8 ÷ 8 7 =	7 9 ÷ 14 15 =	3 10 × 5 3 =

Answer 1

考点：分数的加法和减法,分数乘法,分数除法

专题：运算顺序及法则

分析：根据分数加减乘除法的计算方法进行计算．

解答： 解：

1 3 ÷4= 1 12	1 5 - 1 6 = 1 30	5 12 × 24 25 = 2 5	6 7 - 5 14 = 1 2
5 6 + 1 2 = 4 3	2 3 + 4 5 = 22 15	13÷ 7 3 = 39 7	7 15 × 5 6 = 7 18
8 11 × 22 23 = 16 23	7 8 ÷ 8 7 = 49 64	7 9 ÷ 14 15 = 5 6	3 10 × 5 3 = 1 2

点评：口算时，注意运算符号和数据，然后再进一步计算．