计算,并且验算.
380
×40=[
]|
A .12320 |
B .10080 |
|
C .8100 |
D .15200 |
怎样算简便
7080
×905=[
]|
A .6407400 |
B .353600 |
|
C .646000 |
D .676000 |
怎样算简便
5200
×130=[
]|
A .6407400 |
B .353600 |
|
C .646000 |
D .676000 |
怎样算简便
1040
×340=[
]|
A .6407400 |
B .353600 |
|
C .646000 |
D .676000 |
怎样算简便
850
×760=[
]|
A .6407400 |
B .353600 |
|
C .646000 |
D .676000 |