用递等式计算（能简算的要简算）．12×45÷232112×115-4÷251324×9+1124÷1914÷〔（56-34）×115〕36×（79+34-56）12×34+34+112×34．-数学
| 4 |
| 5 |
| 2 |
| 3 |
=
| 1 |
| 2 |
| 4 |
| 5 |
| 3 |
| 2 |
=
| 3 |
| 5 |
（2）2
| 1 |
| 12 |
| 1 |
| 15 |
| 2 |
| 5 |
=
| 25 |
| 12 |
| 1 |
| 15 |
| 5 |
| 2 |
=
| 5 |
| 36 |
=-9
| 31 |
| 36 |
（3）
| 13 |
| 24 |
| 11 |
| 24 |
| 1 |
| 9 |
=
| 13 |
| 24 |
| 11 |
| 24 |
=（
| 13 |
| 24 |
| 11 |
| 24 |
=1×9，
=9；
（4）
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
