题目内容

1
2
+
1
2
=
2
4
+
1
4
=
5
9
-
4
9
=
5
8
-
3
8
=
4
5
-
3
5
=
1-
4
5
=
2
7
+
3
7
=
4
9
+
4
9
=
1
6
+
3
6
=
5
6
-
5
6
=
1
3
+
1
3
=
1-
7
10
=
考点:分数的加法和减法
专题:运算顺序及法则
分析:利用同分母分数的加减法计算:分母不变,只把分子相加减;由此计算即可.
解答:
解:
1
2
+
1
2
=1
2
4
+
1
4
=
3
4
5
9
-
4
9
=
1
9
5
8
-
3
8
=
1
4
4
5
-
3
5
=
1
5
1-
4
5
=
1
5
2
7
+
3
7
=
5
7
4
9
+
4
9
=
8
9
1
6
+
3
6
=
2
3
5
6
-
5
6
=0
1
3
+
1
3
=
2
3
1-
7
10
=
3
10
点评:此题考查同分母分数加减法的计算方法.
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网