Question

直接写出得数： 3 8 + 5 8 =	2 7 + 4 7 =	4 5 + 1 5 =	1- 4 6 + 3 6 =	1 3 + 1 3 =
1- 4 9 =	1- 5 10 =	1 5 + 2 5 + 1 5 =	2 6 + 4 6 =	3 4 - 2 4 =

Answer 1

考点：分数的加法和减法

专题：运算顺序及法则

分析：根据同分母分数加减法的计算方法进行计算．

解答： 解：

3 8 + 5 8 =1	2 7 + 4 7 = 6 7	4 5 + 1 5 =1	1- 4 6 + 3 6 = 5 6	1 3 + 1 3 = 2 3
1- 4 9 = 5 9	1- 5 10 = 1 2	1 5 + 2 5 + 1 5 = 4 5	2 6 + 4 6 =1	3 4 - 2 4 = 1 4

点评：同分母分数相加减，分母不变，只把分子相加减．