脱式计算，能简算的要简算．12-(34-38)23+(12-16)314+513+81349+17+59+67478-711+18-41135-1120+34．-数学
=
| 2 |
| 3 |
| 1 |
| 3 |
=1；
（3）
| 3 |
| 14 |
| 5 |
| 13 |
| 8 |
| 13 |
=
| 3 |
| 14 |
| 5 |
| 13 |
| 8 |
| 13 |
=
| 3 |
| 14 |
=1
| 3 |
| 14 |
（4）
| 4 |
| 9 |
| 1 |
| 7 |
| 5 |
| 9 |
| 6 |
| 7 |
=（
| 4 |
| 9 |
| 5 |
| 9 |
| 1 |
| 7 |
| 6 |
| 7 |
=1+1，
=2；
（5）4
| 7 |
| 8 |
| 7 |
| 11 |
| 1 |
| 8 |
| 4 |
| 11 |
=（4
| 7 |
| 8 |
| 1 |
| 8 |
| 7 |
| 11 |
| 4 |
| 11 |
=5-1，
=4；
（6）
| 3 |
| 5 |
| 11 |
| 20 |
| 3 |
| 4 |
=
| 1 |
| 20 |
