试题
题目:
计算:
(1)-3
2
-(-2)
2
; (2)
-
1
4
-
1
6
×[2-(-3
)
2
]
;
(3)(-10)
2
+[(-4)
2
-(3+3
2
)×2]; (4)
(-1
)
4
-(1-0.5)×
1
3
×[2-(-2
)
2
]
;
(5)
-0.
5
2
+
1
4
-|-
2
2
-4|-(-1
1
2
)
3
×
4
9
; (6)(-2)
3
-3×[(-4)
2
+2]-(-3)
2
÷(-2);
(7)(-2)
2003
+(-2)
2002
; (8)(-0.25)
2009
×4
2008
.
答案
解:(1)-3
2
-(-2)
2
-9-4
=-13;
(2)
-
1
4
-
1
6
×[2-(-3
)
2
]
=-1-
1
6
×(-7)
=-1+
7
6
=
1
6
;
(3)(-10)
2
+[(-4)
2
-(3+3
2
)×2]
=100+(16-24)
=92;
(4)
(-1
)
4
-(1-0.5)×
1
3
×[2-(-2
)
2
]
=1-
1
6
×(-2)
=1
1
3
;
(5)
-0.
5
2
+
1
4
-|-
2
2
-4|-
(-1
1
2
)
3
×
4
9
=-0.25+
1
4
-8+
27
8
×
4
9
=-6.5;
(6)(-2)
3
-3×[(-4)
2
+2]-(-3)
2
÷(-2)
=(-8)-3×18+
9
2
=(-8)-54+
9
2
=-62+
9
2
=-
115
2
;
(7)(-2)
2003
+(-2)
2002
=-2
2003
+2
2002
=-2
2002
×2+2
2002
=2
2002
×(-2+1)
=-2
2002
;
(8)(-0.25)
2009
×4
2008
=-(
1
4
)
2009
×4
2008
=-
1
4
×(
1
4
×4)
2008
=-
1
4
.
解:(1)-3
2
-(-2)
2
-9-4
=-13;
(2)
-
1
4
-
1
6
×[2-(-3
)
2
]
=-1-
1
6
×(-7)
=-1+
7
6
=
1
6
;
(3)(-10)
2
+[(-4)
2
-(3+3
2
)×2]
=100+(16-24)
=92;
(4)
(-1
)
4
-(1-0.5)×
1
3
×[2-(-2
)
2
]
=1-
1
6
×(-2)
=1
1
3
;
(5)
-0.
5
2
+
1
4
-|-
2
2
-4|-
(-1
1
2
)
3
×
4
9
=-0.25+
1
4
-8+
27
8
×
4
9
=-6.5;
(6)(-2)
3
-3×[(-4)
2
+2]-(-3)
2
÷(-2)
=(-8)-3×18+
9
2
=(-8)-54+
9
2
=-62+
9
2
=-
115
2
;
(7)(-2)
2003
+(-2)
2002
=-2
2003
+2
2002
=-2
2002
×2+2
2002
=2
2002
×(-2+1)
=-2
2002
;
(8)(-0.25)
2009
×4
2008
=-(
1
4
)
2009
×4
2008
=-
1
4
×(
1
4
×4)
2008
=-
1
4
.
考点梳理
考点
分析
点评
专题
有理数的乘方;有理数的混合运算.
分别根据有理数混合运算的法则先算乘方、再算乘除,最后算加减,有括号的先算括号里面的运算顺序计算.
本题考查的是有理数的混合运算,熟知有理数混合运算的法则是解答此题的关键.
计算题.
找相似题
计算:
(1)
(-2)÷[(-
1
2
)
2
×(
1
2
)
3
]×|-
25
4
|-(-5)
;
(2)-(-1)
2005
+4÷(-2)-|-1
2
|.
计算下列各式的值:
(1)
0.25×(-2
)
3
-[4÷(-
2
3
)
2
+1]+(-1
)
2008
;
(2)(
7
9
-
5
6
+
3
4
-
7
18
)×(-36).
计算:
-
1
4
-(
7
3
-
11
17
-
14
15
)×(-五五)÷(-1
)
7五五9
计算:
①
(
1
6
-
1
8
+
1
12
)÷(-
1
24
)
;
②-2
2
-(-2)
2
+(-3)
2
×(-
2
3
)-4
2
÷|-4|.
①计算:(+12)+(-23)-(-33)
②计算:
-
2
2
-16÷(-4)×(-
3
4
)