数学
(2007·衡阳)计算:
12
+(
1
3
)
-1
-(-3)
0
-|-
3
|.
(2006·芜湖)(1)计算:
12
+(
1
4
)
-1
-(
2
+1
)
0
;
(3)计算:
2a
a
2
-9
-
1
a-3
.
(2006·沈阳)计算:
(-3
)
-2
+
8
-|1-2
2
|-(
6
-3
)
0
(2006·连云港)(1)化简:(
1
2
m+n)(m-2n);
(2)计算:3×2
0
-(
1
2
)
2
+
2
3
-1
.
(2006·锦州)计算:
2
(1+2
3
)+
(-2)
2
-
(1-
3
)
0
-
24
.
(2006·贺州)计算:
(-π
)
0
+
1
2
+1
-
1
2
8
.
(2006·北京)计算:
2
2
-1
-
8
-(
2
+1
)
0
.
(2005·镇江)计算:
2
2
+1
-
8
+(
1
3
)
-1
(2005·苏州)不使用计算器,计算:
18
-
1
2
÷
2
-1
+
1
2
+1
-(
2
-1)
(2005·深圳)计算:(
3
-1
)
0
+(
1
3
)
-1
-
(-
5
)
2
-|-1|.
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