计算下面各题，能用简便方法的就用简便方法99×979824×（78+32-34）16×23÷(45-815)49÷45-（15-13）1-（14+38）÷14358×57+27÷835．-数学
=24×
| 7 |
| 8 |
| 3 |
| 2 |
| 3 |
| 4 |
=21+36-18，
=39；
（3）
| 1 |
| 6 |
| 2 |
| 3 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 1 |
| 9 |
| 4 |
| 15 |
=
| 1 |
| 9 |
| 15 |
| 4 |
=
| 5 |
| 12 |
（4）
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 5 |
| 4 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 5 |
| 9 |
| 1 |
| 3 |
| 1 |
| 5 |
=
| 31 |
| 45 |
（5）1-（
| 1 |
| 4 |
| 3 |
| 8 |
| 1 |
| 4 |
=1-
| 5 |
| 8 |
=1-
| 5 |
| 2 |
=-
| 3 |
| 2 |
（6）
