| 3 |
| 8 |
1÷0.05=20，
9.7+0.03=9.73，
| 4 |
| 5 |
| 5 |
| 28 |
| 1 |
| 7 |
78×9.9+7.8=780，
12-2
| 7 |
| 9 |
| 2 |
| 9 |
10÷10%=100，
1-
| 1 |
| 4 |
| 1 |
| 3 |
| 5 |
| 12 |
6
| 13 |
| 17 |
| 3 |
| 4 |
| 13 |
| 17 |
| 3 |
| 7 |
| 5 |
| 21 |
| 3 |
| 7 |
| 10 |
| 21 |
| 5 |
| 7 |
| 3 |
| 8 |
| 4 |
| 5 |
| 5 |
| 28 |
| 7 |
| 9 |
| 1 |
| 4 |
| 1 |
| 3 |
| 13 |
| 17 |
| 3 |
| 4 |
| 3 |
| 7 |
| 5 |
| 21 |
| 3 |
| 7 |
| 10 |
| 21 |
| 3 |
| 8 |
| 4 |
| 5 |
| 5 |
| 28 |
| 1 |
| 7 |
| 7 |
| 9 |
| 2 |
| 9 |
| 1 |
| 4 |
| 1 |
| 3 |
| 5 |
| 12 |
| 13 |
| 17 |
| 3 |
| 4 |
| 13 |
| 17 |
| 3 |
| 7 |
| 5 |
| 21 |
| 3 |
| 7 |
| 10 |
| 21 |
| 5 |
| 7 |