题目内容
999
+99
+9
+
.
| 8 |
| 9 |
| 8 |
| 9 |
| 8 |
| 9 |
| 1 |
| 3 |
999
+99
+9
+
,
=999
+99
+9
+
,
=(999
+
)+(99
+
)+(9
+
),
=1000+100+10,
=1110.
| 8 |
| 9 |
| 8 |
| 9 |
| 8 |
| 9 |
| 1 |
| 3 |
=999
| 8 |
| 9 |
| 8 |
| 9 |
| 8 |
| 9 |
| 3 |
| 9 |
=(999
| 8 |
| 9 |
| 1 |
| 9 |
| 8 |
| 9 |
| 1 |
| 9 |
| 8 |
| 9 |
| 1 |
| 9 |
=1000+100+10,
=1110.
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