计算下面各题，能用简便算法的要用简便算法． （1）10-89×38÷34 （2）2-511-611 （3）34×57?34×17 （4）14÷（3-513?813）
（1）10-
| 8 |
| 9 |
| 3 |
| 8 |
| 3 |
| 4 |
=10-
| 1 |
| 3 |
| 3 |
| 4 |
=10-
| 4 |
| 9 |
=9
| 5 |
| 9 |
（2）2-
| 5 |
| 11 |
| 6 |
| 11 |
=2-（
| 5 |
| 11 |
| 6 |
| 11 |
=2-1，
=1；
（3）
| 3 |
| 4 |
| 5 |
| 7 |
| 3 |
| 4 |
| 1 |
| 7 |
=
| 3 |
| 4 |
| 5 |
| 7 |
| 1 |
| 7 |
=
| 3 |
| 4 |
| 4 |
| 7 |
=
| 3 |
| 7 |
（4）
| 1 |
| 4 |
| 5 |
| 13 |
| 8 |
| 13 |
=
| 1 |
| 4 |
| 5 |
| 13 |
| 8 |
| 13 |
=
| 1 |
| 4 |
=
| 1 |
| 4 |
=
| 1 |
| 8 |
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