526
+199=[
]|
A .526+200+1 |
B .526+200-1 |
|
C .526+200 |
D .526-200-1 |
734
-398的简便算法是[
]|
A .734-400-2 |
B .734-400+2 |
|
C .734-400-98 |
D .734-2+400 |
526
+199=[
]|
A .526+200+1 |
B .526+200-1 |
|
C .526+200 |
D .526-200-1 |
734
-398的简便算法是[
]|
A .734-400-2 |
B .734-400+2 |
|
C .734-400-98 |
D .734-2+400 |