题干
| 3 |
| 8 |
| 1 |
| 2 |
| 1 |
| 4 |
3−(
+1 2
)= ____3 4
+(1 2
−4 5
)= ____7
答案(点此获取答案解析）
,,
| 3 |
| 8 |
| 1 |
| 2 |
| 1 |
| 4 |
3−(
+1 2
)= ____3 4
+(1 2
−4 5
)= ____7
