计算: (1) ÷÷ (2)÷. (3)÷(a2-2ab+b2)÷ 查看更多

 

题目列表(包括答案和解析)

计算:
(1)22+(-
1
2
)-2-3-1+
1
9
+(π-3.14)0

(2)1-
a-b
a+b
÷
a2-b2
a2+2ab+b2

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4、计算:(a-b+3)(a+b-3)=(  )

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计算:
(1)
m2-n2
m2+mn
                                          
(2)
a-1
a-2
a2-4
a2-2a+1
÷
1
a2-1

(3)
8xy2
3a2b
÷(
1
2
xy)
2
                                      
(4)(
x3y
z
)
2
(
xz
y
)(
yz
x2
)
3

(5)
1
a+3
-
a+1
a+3
                              
(6)
3b2
16a
÷
bc
2a2
•(-
2a
b
)

(7)(xy-x2)•
xy
x-y
  
(8)
a2-6a+9
4-b2
÷
3-a
2+b
a2
3a-9

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计算:
(1)
a2-b2
a2+2ab+b2
÷
2a-2b
a+b
               
(2)
2x
x2-4
-
1
x-2

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计算
(1)
3x
x-4y
+
x+y
4y-x
-
7y
x-4y

(2)(
a2+b2
a2-b2
-
a-b
a+b
)+
2ab
(a-b)(a+b)

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