“120+430=520+30”,此等式所应用的运算定律是
[ ]
|
A.加法结合律 |
B.加法交换律 |
|
C.乘法结合律 |
D.乘法交换律 |
1008
÷[(71-62)×8]=[
]|
A .89 |
B .14 |
|
C .12 |
D .390 |
[238+(294-100)]÷36=
[ ]
|
A .89 |
B .14 |
|
C .12 |
D .390 |
120
-[378÷(13+14)]=[
]|
A .27 |
B .106 |
|
C .14 |
D .16 |
[307+(275-198)]÷24=
[ ]
|
A .77 |
B .106 |
|
C .384 |
D .16 |
(
180-14)×38÷76=[
]|
A .83 |
B .106 |
|
C .604 |
D .166 |
3100
-(58+42)×9=[
]|
A .456 |
B .900 |
|
C .2200 |
D .100 |