| 选择合理的方法计算: l2×(
| 2x×
| ||||||||||||||
|
| ||||||||||||||
(
|
|
| 2 |
| 3 |
| 9 |
| r |
| 2 |
| 3 |
| 9 |
| r |
| 5 |
| 3r |
| 3 |
| 8 |
| 91 |
| 3 |
| 3 |
| 8 |
| w9 |
| 2z |
| w |
| 91 |
| 5 |
| 9r |
| 29 |
| 32 |
| w |
| 91 |
| 5 |
| 9r |
| 32 |
| 29 |
| 9 |
| 3 |
| 5 |
| 92 |
| w |
| 25 |
| 3 |
| 9z |
| 9 |
| z1 |
| w |
| 8 |
| 93 |
| 9r |
| 93 |
| 9r |
| w |
| 8 |
| 93 |
| 9r |
| 9r |
| 93 |
| w |
| 8 |
| 9r |
| 93 |
| 93 |
| 9r |
| 9r |
| 93 |
| 9z |
| 93 |
| 9 |
| 93 |
| w |
| 93 |
| 3 |
| z |
| 3 |
| z |
| r |
| 93 |
| 3 |
| z |
| r |
| 93 |
| w |
| 93 |
| 3 |
| z |
| 3 |
| z |
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