试题

题目:
计算:
(1)-32-(-2)2;                       (2)-14-
1
6
×[2-(-3)2]

(3)(-10)2+[(-4)2-(3+32)×2];    (4)(-1)4-(1-0.5)×
1
3
×[2-(-2)2]

(5)-0.52+
1
4
-|-22-4|-(-1
1
2
)3×
4
9
;   (6)(-2)3-3×[(-4)2+2]-(-3)2÷(-2);
(7)(-2)2003+(-2)2002;               (8)(-0.25)2009×42008
答案
解:(1)-32-(-2)2-9-4
=-13;
(2)-14-
1
6
×[2-(-3)2]

=-1-
1
6
×(-7)
=-1+
7
6

=
1
6

(3)(-10)2+[(-4)2-(3+32)×2]
=100+(16-24)
=92;
(4)(-1)4-(1-0.5)×
1
3
×[2-(-2)2]

=1-
1
6
×(-2)
=1
1
3

(5)-0.52+
1
4
-|-22-4|-(-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
=-22003+22002
=-22002×2+22002
=22002×(-2+1)
=-22002
(8)(-0.25)2009×42008
=-(
1
4
2009×42008
=-
1
4
×(
1
4
×4)2008
=-
1
4

解:(1)-32-(-2)2-9-4
=-13;
(2)-14-
1
6
×[2-(-3)2]

=-1-
1
6
×(-7)
=-1+
7
6

=
1
6

(3)(-10)2+[(-4)2-(3+32)×2]
=100+(16-24)
=92;
(4)(-1)4-(1-0.5)×
1
3
×[2-(-2)2]

=1-
1
6
×(-2)
=1
1
3

(5)-0.52+
1
4
-|-22-4|-(-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
=-22003+22002
=-22002×2+22002
=22002×(-2+1)
=-22002
(8)(-0.25)2009×42008
=-(
1
4
2009×42008
=-
1
4
×(
1
4
×4)2008
=-
1
4
考点梳理
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.
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