简便方法计算，写出主要计算过程．（1）6.12+37+2.88+47（2）2924-（524-49）（3）1811-（711+38）（4）79+310-29+1710（5）715+712+815-712（6）1511-38-58．-数学
| 4 |
| 9 |
=
| 24 |
| 24 |
| 4 |
| 9 |
=1
| 4 |
| 9 |
（3）
| 18 |
| 11 |
| 7 |
| 11 |
| 3 |
| 8 |
=
| 18 |
| 11 |
| 7 |
| 11 |
| 3 |
| 8 |
=
| 11 |
| 11 |
| 3 |
| 8 |
=1-
| 3 |
| 8 |
=
| 5 |
| 8 |
（4）
| 7 |
| 9 |
| 3 |
| 10 |
| 2 |
| 9 |
| 17 |
| 10 |
=（
| 7 |
| 9 |
| 2 |
| 9 |
| 3 |
| 10 |
| 17 |
| 10 |
=
| 5 |
| 9 |
| 20 |
| 10 |
=2
| 5 |
| 9 |
（5）
| 7 |
| 15 |
| 7 |
| 12 |
| 8 |
| 15 |
| 7 |
| 12 |
=（
| 7 |
| 15 |
