问题 解答题
(1)计算:-3×(-2)2+[(-3)×2]2;      
(2)计算:|-5
1
2
|×(
1
3
-
1
2
3
11
÷1
1
4

(3)5x4+3x2y-1-3x2y-6x4+2             
(4)3( x2y+xy;)-(3x;y-1)-3xy2
答案

(1)-3×(-2)2+[(-3)×2]2

=-3×4+36

=24;

(2)|-5

1
2
|×(
1
3
-
1
2
3
11
÷1
1
4

=

1
2
×(-
1
6
)×
3
11
×
4
5

=-

1
5

(3)5x4+3x2y-1-3x2y-6x4+2  

=(5-6)x4+(3-3)x2y+2-1

=1-x4

(4)3( x2y+xy;)-(3x;y-1)-3xy2

=3x2y+3xy;-3x;y+1-3xy2

=1.

判断题
填空题