9.
|
被减数 |
12 |
13 |
|
13 |
|
15 |
16 |
14 |
|
17 |
|
减数 |
7 |
|
5 |
7 |
4 |
9 |
|
8 |
5 |
|
|
差 |
|
6 |
7 |
|
8 |
|
9 |
|
9 |
8 |