计算:(6ec8aac122bd4f6e-26ec8aac122bd4f6e)·(-6ec8aac122bd4f6e);          

 

计算:(6ec8aac122bd4f6e-26ec8aac122bd4f6e)÷6ec8aac122bd4f6e

 

计算:6ec8aac122bd4f6e×26ec8aac122bd4f6e6ec8aac122bd4f6e÷6ec8aac122bd4f6e;         

 

计算6ec8aac122bd4f6e6ec8aac122bd4f6e+66ec8aac122bd4f6e,结果为(  )

A.56ec8aac122bd4f6e     B.6ec8aac122bd4f6e6ec8aac122bd4f6e     C.46ec8aac122bd4f6e     D.96ec8aac122bd4f6e

 

如果6ec8aac122bd4f6e·6ec8aac122bd4f6e=6ec8aac122bd4f6e ,则(  )

A.a≥4     B.a≥0     C.0≤a≤4    D.a为一切实数

 

下列各式计算正确的是(  )

A.6ec8aac122bd4f6e=4+3=7        

B.(2+6ec8aac122bd4f6e)(1-6ec8aac122bd4f6e)=2-6=-4

C.(6ec8aac122bd4f6e+6ec8aac122bd4f6e2=(6ec8aac122bd4f6e2+(6ec8aac122bd4f6e2=3+5=8

D.(-6ec8aac122bd4f6e+6ec8aac122bd4f6e)(-6ec8aac122bd4f6e-6ec8aac122bd4f6e)=(-6ec8aac122bd4f6e2-(6ec8aac122bd4f6e2=2-3=-1

 

下列各式计算正确的是(  )

A.26ec8aac122bd4f6e+36ec8aac122bd4f6e=56ec8aac122bd4f6e     B.26ec8aac122bd4f6e-6ec8aac122bd4f6e=1

C.26ec8aac122bd4f6e×36ec8aac122bd4f6e=66ec8aac122bd4f6e    D.26ec8aac122bd4f6e×36ec8aac122bd4f6e=66ec8aac122bd4f6e

 

6ec8aac122bd4f6e+6ec8aac122bd4f6e-6ec8aac122bd4f6e=_________.

 

36ec8aac122bd4f6e+46ec8aac122bd4f6e-6ec8aac122bd4f6e6ec8aac122bd4f6e=_______;  

 

6ec8aac122bd4f6e+6ec8aac122bd4f6e-6ec8aac122bd4f6e=________;

 

6ec8aac122bd4f6e+6ec8aac122bd4f6e-6ec8aac122bd4f6e=_______;     

 

在如图的4×4方格内画△ABC,使它的顶点都在格点上,三条边长分别为6ec8aac122bd4f6e6ec8aac122bd4f6e,4,6ec8aac122bd4f6e

6ec8aac122bd4f6e

 

已知等边三角形的边长为46ec8aac122bd4f6ecm,则它的高为______cm.

 

化简:6ec8aac122bd4f6e=________.

 

化简:6ec8aac122bd4f6e=________;

 

已知△ABC中,∠C=Rt∠,若AC=5cm,BC=4cm,求AB的长.

 

化简:6ec8aac122bd4f6e6ec8aac122bd4f6e=________.

 

6ec8aac122bd4f6e=_________;

 

化简:6ec8aac122bd4f6e=________;

 

计算:6ec8aac122bd4f6e的值为(  )

A.6ec8aac122bd4f6e6ec8aac122bd4f6e    B.6ec8aac122bd4f6e6ec8aac122bd4f6e    C.6ec8aac122bd4f6e6ec8aac122bd4f6e    D.86ec8aac122bd4f6e

 

化简56ec8aac122bd4f6e结果正确的是(  )

A.6ec8aac122bd4f6e6ec8aac122bd4f6e    B.256ec8aac122bd4f6e    C.6ec8aac122bd4f6e    D.6ec8aac122bd4f6e

 

化简:6ec8aac122bd4f6e=________;

 

化简:6ec8aac122bd4f6e=_________.

 

化简:6ec8aac122bd4f6e=_________;  

 

判断题(对的打“∨”,错的打“×”)

(1)6ec8aac122bd4f6e=3.14-6ec8aac122bd4f6e  (  )    (2)6ec8aac122bd4f6e=32×56ec8aac122bd4f6e=1356ec8aac122bd4f6e  (  )

(3)6ec8aac122bd4f6e=6ec8aac122bd4f6e=6ec8aac122bd4f6e  (  )        (4)6ec8aac122bd4f6e=6ec8aac122bd4f6e=6ec8aac122bd4f6e (  )

 

已知P是直角坐标系内一点,若点P的坐标为(6ec8aac122bd4f6e6ec8aac122bd4f6e),则它到原点的距离是_______.

 

计算:6ec8aac122bd4f6e

 

计算:6ec8aac122bd4f6e+6ec8aac122bd4f6e

 

计算:6ec8aac122bd4f6e+6ec8aac122bd4f6e;   

 

计算:6ec8aac122bd4f6e-|6ec8aac122bd4f6e-6ec8aac122bd4f6e|.

 

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