题目内容
计算:(1)-32-(-2)2; (2)-14-
| 1 |
| 6 |
(3)(-10)2+[(-4)2-(3+32)×2]; (4)(-1)4-(1-0.5)×
| 1 |
| 3 |
(5)-0.52+
| 1 |
| 4 |
| 1 |
| 2 |
| 4 |
| 9 |
(7)(-2)2003+(-2)2002; (8)(-0.25)2009×42008.
分析: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.
解答:解:(1)-32-(-2)2-9-4
=-13;
(2)-14-
×[2-(-3)2]
=-1-
×(-7)
=-1+
=
;
(3)(-10)2+[(-4)2-(3+32)×2]
=100+(16-24)
=92;
(4)(-1)4-(1-0.5)×
×[2-(-2)2]
=1-
×(-2)
=1
;
(5)-0.52+
-|-22-4|-(-1
)3×
=-0.25+
-8+
×
=-6.5;
(6)(-2)3-3×[(-4)2+2]-(-3)2÷(-2)
=(-8)-3×18+
=(-8)-54+
=-62+
=-
;
(7)(-2)2003+(-2)2002
=-22003+22002
=-22002×2+22002
=22002×(-2+1)
=-22002;
(8)(-0.25)2009×42008
=-(
)2009×42008
=-
×(
×4)2008
=-
.
=-13;
(2)-14-
| 1 |
| 6 |
=-1-
| 1 |
| 6 |
=-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 |
=1-
| 1 |
| 6 |
=1
| 1 |
| 3 |
(5)-0.52+
| 1 |
| 4 |
| 1 |
| 2 |
| 4 |
| 9 |
=-0.25+
| 1 |
| 4 |
| 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 |
=-
| 1 |
| 4 |
| 1 |
| 4 |
=-
| 1 |
| 4 |
点评: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.
练习册系列答案
相关题目