题目内容
4
+
+
+
+
.
| 11 |
| 12 |
| 4911 |
| 12 |
| 49911 |
| 12 |
| 499911 |
| 12 |
| 1 |
| 3 |
4
+
+
+
+
,
=(5-
)+(50-
)+(500-
)+(5000-
)+
,
=(5000+500+50+5)-
×4+
,
=5555-
+
,
=5555.
| 11 |
| 12 |
| 4911 |
| 12 |
| 49911 |
| 12 |
| 499911 |
| 12 |
| 1 |
| 3 |
=(5-
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 3 |
=(5000+500+50+5)-
| 1 |
| 12 |
| 1 |
| 3 |
=5555-
| 1 |
| 3 |
| 1 |
| 3 |
=5555.
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