问题
解答题
| 计算下面各题，能简算的要简算． （1）
（2）
（3）4×
（4）（0.8-
（5）
（6）（
|
答案
（1）
| 5 |
| 12 |
| 5 |
| 7 |
=
| 5 |
| 12 |
| 5 |
| 7 |
=
| 5 |
| 12 |
=
| 1 |
| 12 |
（2）
| 8 |
| 13 |
| 1 |
| 7 |
| 6 |
| 13 |
=（
| 8 |
| 13 |
| 6 |
| 13 |
| 1 |
| 7 |
=
| 14 |
| 13 |
| 1 |
| 7 |
=
| 2 |
| 13 |
（3）4×
| 5 |
| 12 |
| 5 |
| 9 |
=4×（
| 5 |
| 12 |
| 9 |
| 5 |
=4×
| 3 |
| 4 |
=4；
（4）（0.8-
| 2 |
| 5 |
| 2 |
| 9 |
| 1 |
| 3 |
=0.4÷
| 5 |
| 9 |
=
| 18 |
| 25 |
（5）
| 2 |
| 3 |
| 2 |
| 3 |
| 1 |
| 6 |
=
| 2 |
| 3 |
| 1 |
| 2 |
=1
| 1 |
| 3 |
（6）（
| 7 |
| 12 |
| 11 |
| 18 |
| 5 |
| 36 |
=
| 7 |
| 12 |
| 36 |
| 5 |
| 11 |
| 18 |
| 36 |
| 5 |
=
| 21 |
| 5 |
| 22 |
| 5 |
=8
| 3 |
| 5 |