题目内容
①1
-
=______
②
+
=______.
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②
| 3 |
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| 4 |
①1
-
=1
;
②
+
=
.
故答案为:1
,
.
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
②
| 3 |
| 4 |
| 2 |
| 4 |
| 5 |
| 4 |
故答案为:1
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