题目：
计算①3
| 1 |
| f |
| 1 |
| 3 |
| f |
| 3 |
| 1 |
| f |
②-3f×(-
| 1 |
| 3 |
| 1 |
| f |
③(-f4)÷(
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 4 |
④|-3|-
| 144 |
| 3 |
| f |
| 1 |
| 4 |
答案
解：①原式=2| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
=3+3
=6；
②原式=-9×
| 1 |
| 9 |
| 1 |
| 4 |
=-1+32
=31；
③原式=-24÷
| 1 |
| 12 |
=-292；
④原式=3-12+
| 27 |
| 了 |
=-9+13.多
=4.多．
解：①原式=2
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
=3+3
=6；
②原式=-9×
| 1 |
| 9 |
| 1 |
| 4 |
=-1+32
=31；
③原式=-24÷
| 1 |
| 12 |
=-292；
④原式=3-12+
| 27 |
| 了 |
=-9+13.多
=4.多．
（2004·长沙）如图是一个数值转换机，若输入的a值为