(1)计算:-3×(-2)2+[(-3)×2]2;      (2)计算:|-512|×(13-12)×311÷114(3)5x4+3x2y-1-3x2y-6x

(1)计算:-3×(-2)2+[(-3)×2]2;      (2)计算:|-512|×(13-12)×311÷114(3)5x4+3x2y-1-3x2y-6x

题型:解答题难度:一般来源:不详
(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+xy2 )-(3x2 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+xy2 )-(3x2 y-1)-3xy2
=3x2y+3xy2 -3x2 y+1-3xy2
=1.
举一反三
计算:
(1)8+(-10)+(-2)-(-5)
(2)2
1
7
-3
2
3
-5
1
3
+(-3
1
7

(3)8×(-
4
5
)÷|-16|
(4)18×(-
2
3
)+13×
2
3
-4×
2
3

(5)[30-(
7
9
+
5
6
-
11
12
)×(-36)]÷(-5)
(6)39
23
24
×(-12)
题型:解答题难度:一般| 查看答案
计算:-23+|-3|÷(-
3
2
)
题型:解答题难度:一般| 查看答案
-35÷(-7)×(-
1
7
)
题型:解答题难度:一般| 查看答案
(1)(-19)-(+42)-(-5)+(-9)
(2)(-5)×(-7)-5×(-6)
(3)(
5
12
+
2
3
-
3
4
)×(-12)

(4)(-3)2-23÷
1
3
×3
题型:解答题难度:一般| 查看答案
-14÷(-5)2×(-
5
3
)+|0.8-1|
题型:解答题难度:一般| 查看答案
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