题目内容
(1)
+
=______
(2)
-
=______.
| 2 |
| 9 |
| 7 |
| 9 |
(2)
| 4 |
| 15 |
| 2 |
| 15 |
(1)
+
=1,
(2)
-
=
.
故答案为:1,
.
| 7 |
| 9 |
| 2 |
| 9 |
(2)
| 4 |
| 15 |
| 2 |
| 15 |
| 2 |
| 15 |
故答案为:1,
| 2 |
| 15 |
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题目内容
| 2 |
| 9 |
| 7 |
| 9 |
| 4 |
| 15 |
| 2 |
| 15 |
| 7 |
| 9 |
| 2 |
| 9 |
| 4 |
| 15 |
| 2 |
| 15 |
| 2 |
| 15 |
| 2 |
| 15 |