计算下面各题，能简算的要简算．①12+15-14②611+1115+511-615③23-56+13④2-27-57⑤58-(58-12)⑥29+(34-12)．-数学
| 5 |
| 11 |
| 6 |
| 15 |
=（
| 6 |
| 11 |
| 5 |
| 11 |
| 11 |
| 15 |
| 6 |
| 15 |
=1+
| 1 |
| 3 |
=1
| 1 |
| 3 |
③
| 2 |
| 3 |
| 5 |
| 6 |
| 1 |
| 3 |
=
| 2 |
| 3 |
| 1 |
| 3 |
| 5 |
| 6 |
=1-
| 5 |
| 6 |
=
| 1 |
| 6 |
④2-
| 2 |
| 7 |
| 5 |
| 7 |
=2-（
| 2 |
| 7 |
| 5 |
| 7 |
=2-1，
=1；
⑤
| 5 |
| 8 |
| 5 |
| 8 |
| 1 |
| 2 |
=
| 5 |
| 8 |
| 5 |
| 8 |
| 1 |
| 2 |
=0+
| 1 |
| 2 |
=
| 1 |
| 2 |
⑥
| 2 |
| 9 |
| 3 |
| 4 |
