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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