判断题(对的打“∨”,错的打“×”)
(1)(-1)0=-10=-1;( ) ;( )
(3)-(-2)-1=-(-2-1);( ) (4)5x-2=.( )
计算:
(1)-0.10=________; (2)(-0.1)0=_______;
(3)(-0.5)-2=_______; (4)(-)-1=________.
a0=______(a≠0);a-p=_______(a≠0,p是正整数).
现定义运算a*b=2ab-a-b,试计算6*(3*2)的值.
若a2m=25,则a-m等于( )
A. B.-5 C.或- D.
解方程:x=()5.