精英家教网 > 小学数学 > 题目详情
4
7
+
2
7
=
5
8
+
3
8
=
4
5
+
4
5
=
1-
5
6
=
1
2
+
1
2
=
1-
1
2
=
1
4
+
2
4

5
10
-
1
10
=
分析:根据同分母分数加减法的计算方法进行计算.
解答:解:
4
7
+
2
7
=
6
7

5
8
+
3
8
=1
4
5
+
4
5
=
8
5

1-
5
6
=
1
6

1
2
+
1
2
=1
1-
1
2
=
1
2

1
4
+
2
4
=
3
4

5
10
-
1
10
=
2
5
点评:考查了同分母分数加减法的计算,分母不变,只把分子相加减.
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