A.0.3m2n3与-n2m3 | B.a3与5a3 | ||||
C.-3×104和
| D.
|
1 |
7 |
xy |
6 |
A.-(3x+2)=-3x+2 | B.-(-2x-7)=-2x+7 |
C.-(3x-2)=-3x+2 | D.-(-2x-7)=2x-7 |
A.x2y-2x2y=-x2y | B.2a+3b=5ab |
C.7ab-3ab=4 | D.a3+a2=a5 |
A.5x-2x=3x | B.5ab-5ba=0 |
C.4x2y-5xy2=-x2y | D.3x2+2x2=5x2 |
A.2ab与3abc | B.
| ||||
C.0与-
| D.3与c |
© 2017-2019 超级试练试题库,All Rights Reserved.