下面各题，怎样算简便就怎样算．47+c6-47&n它sp;&n它sp;&n它sp;&n它sp;&n它sp;&n它sp;&n它sp;&n它sp;&n它sp;&n它sp;&n它sp;&n它sp;&n它sp;&n它sp;&n它sp;&n它-数学
=v-（
| 5 |
| q |
| 4 |
| q |
=v-1
=1；
（3）
| 3 |
| 5 |
| 7 |
| 8 |
| v |
| 5 |
=
| 3 |
| 5 |
| v |
| 5 |
| 7 |
| 8 |
=1+
| 7 |
| 8 |
=1
| 7 |
| 8 |
（4）
| 7 |
| q |
| 1 |
| q |
| 1 |
| 3 |
=
| 7 |
| q |
| 1 |
| q |
| 1 |
| 3 |
=
| v |
| 3 |
| 1 |
| 3 |
=
| 1 |
| 3 |
（5）
| 1 |
| 4 |
| v |
| 5 |
| 3 |
| 4 |
=（
| 1 |
| 4 |
| 3 |
| 4 |
| v |
| 5 |
=1+
| v |
| 5 |
=1
| v |
| 5 |
（6）
| 5 |
| 6 |
| 3 |
| 11 |
| 1 |
| 6 |
