填一填.
|
( )+400=3500 |
2000-( )=1400 |
填一填.
|
(1)( )-300=7300 |
(2)( )+5000=6400 |
填一填.
|
(1)240+( )=290 |
(2)660-( )=60 |
填一填.
|
( )+400=3500 |
2000-( )=1400 |
填一填.
|
(1)( )-300=7300 |
(2)( )+5000=6400 |
填一填.
|
(1)240+( )=290 |
(2)660-( )=60 |