题目内容
在( )里填上合适的数.
+
=
-
=0
-
=
+
=
+
=1
1-
=
.
3 |
7 |
( ) |
7 |
5 |
7 |
( ) |
9 |
4 |
9 |
5 |
6 |
( ) |
( ) |
1 |
6 |
1 |
5 |
1 |
( ) |
2 |
5 |
3 |
8 |
( ) |
8 |
1-
( ) |
10 |
3 |
10 |
分析:根据分数加减法的计算方法进行计算.
解答:解:
+
=
-
=0
-
=
+
=
+
=1
1-
=
3 |
7 |
2 |
7 |
5 |
7 |
4 |
9 |
4 |
9 |
5 |
6 |
4 |
6 |
1 |
6 |
1 |
5 |
1 |
5 |
2 |
5 |
3 |
8 |
5 |
8 |
1-
7 |
10 |
3 |
10 |
点评:考查了同分母分数加减法,分母不变,只把分子相加减.
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