计算下面各题（能简算的要简算）．1415×（1-27）59×[34-（716-14）]457-（57+2.5）18×58+42÷8512×19+79×512+512÷99.84-137-247．-数学
=
| 5 |
| 9 |
| 3 |
| 4 |
| 7 |
| 16 |
| 1 |
| 4 |
=
| 5 |
| 9 |
| 7 |
| 16 |
=
| 5 |
| 9 |
| 9 |
| 16 |
=
| 5 |
| 16 |
（3）4
| 5 |
| 7 |
| 5 |
| 7 |
=4
| 5 |
| 7 |
| 5 |
| 7 |
=4-2.5，
=1.5；
（4）
| 1 |
| 8 |
=
| 1 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 8 |
=
| 1 |
| 8 |
=12.5；
（5）
| 5 |
| 12 |
| 1 |
| 9 |
| 7 |
| 9 |
| 5 |
| 12 |
| 5 |
| 12 |
=
| 5 |
| 12 |
| 1 |
| 9 |
| 7 |
| 9 |
| 5 |
| 12 |
| 5 |
| 12 |
| 1 |
| 9 |
=
| 5 |
| 12 |
