计算:(1)2(1+2)+48+412;(2)93x-712x+26×38x;(3)(7+43)(2-3)2+(2+3)(2-3);(4)-22×8+32(3-

计算:(1)2(1+2)+48+412;(2)93x-712x+26×38x;(3)(7+43)(2-3)2+(2+3)(2-3);(4)-22×8+32(3-

题型:解答题难度:一般来源:不详
计算:
(1)2(1+


2
)+


48
+4


1
2

(2)9


3x
-7


12x
+2


6
×3


8x

(3)(7+4


3
)(2-


3
)2+(2+


3
)(2-


3
)

(4)-22×


8
+3


2
(3-2


2
)-
1
1+


2

(5)
2x
3


9x
-x2


1
x3
+6x


x
16

(6)2a[


3ab2
-(
1
12


27ab2
-b


3a
4
)](b≥0).
答案
(1)原式=2+2


2
+4


3
+2


2

=2+4


2
+4


3

(2)原式=9


3x
-14


3x
+24


3x

=19


3x

(3)原式=(7+4


3
)(7-4


3
)+4-3
=49-48+1
=2;
(4)原式=-4×


2
+9


2
-12-(


2
-1

=-8


2
+9


2
-12-


2
+1
=-11;
(5)原式=
2x
3
 ×3 


x
-x2 × 
1
 x 


x
+6x× 


x
4

=2x


x


x
+
3
2
x


x

=
7x-2
2


x

(6)原式=2a(b


3a
-
1
12
×3b 


3a
+


3a
2

=2ab


3a
-
ab 


3a
2
+ab


3a

=
5
2
ab


3a
举一反三
计算(


3
+1
2005-2(


3
+1
2004-2(


3
+1
2003+2005=______.
题型:填空题难度:一般| 查看答案
计算
(1)(


3
8
-3


3
)•


12
;             
(2)(3


2
-


12
)(


18
+2


3
)
题型:解答题难度:一般| 查看答案
计算:(1)(5


48
-


12


3

(2)(-3)0+|1-


2
|+
1


2

(3)(3+2


5
)2-(3-2


5
)2
题型:解答题难度:一般| 查看答案
计算
(1)


1
2
-


12
+


18
-


27

(2)


45
-
1


5
+
1


5
+1
题型:解答题难度:一般| 查看答案
化简


18
-


3
×


27

(


3
-


2
)2



20
+


5


5
+2


1
2



(-5)2
+


4
×


1
2
+|


2
-2|-(


9
)2
题型:解答题难度:一般| 查看答案
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