题目内容
我会用简便方法计算．
×
+
×
+0.75×
-
．
| 3 |
| 4 |
| 1 |
| 5 |
| 3 |
| 4 |
| 2 |
| 5 |
| 3 |
| 5 |
| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 5 |
| 3 |
| 4 |
| 2 |
| 5 |
| 3 |
| 5 |
| 3 |
| 4 |
=
| 3 |
| 4 |
| 1 |
| 5 |
| 3 |
| 4 |
| 2 |
| 5 |
| 3 |
| 4 |
| 3 |
| 5 |
| 3 |
| 4 |
=
| 3 |
| 4 |
| 1 |
| 5 |
| 2 |
| 5 |
| 3 |
| 5 |
=
| 3 |
| 4 |
| 1 |
| 5 |
=
| 3 |
| 20 |
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