题目内容
化简下列各数:
(1)-(+3);
(2)-(-3);
(3)+(+3);
(4)+(-3);
(1)-3 (2)3 (3)3 (4)-3
观察下列各组数,请找出它们的排列规律,并写出后面的2个数.
(1),-2,0,2,4,…
(2)1,,,,-,…
(3)1,0,-1,0,1,0,-l,0…
(4)2,4,-6,8,10,-12,14,…
填空:
(1)+1.3的相反数是________;
(2)-100的相反数是________;
(3)________的相反数是-1.7;
(4)________的相反数是;
(5)-(+4)是________的相反数;
(6)-(-7)是________的相反数.
分别写出下列各数的相反数:
-5,1,-3,0,-1,6,-0.2,,-0.5.
如果a的相反数是-2,且2x+3a=4.求x的值.
-8的相反数是
A.
-8
B.
-
C.
D.
8
绝对值是3的数只有+3.( )
比较大小:
(1)与;
(2)与.
计算:
(1);
(2)(+1.7)+(-3.5)+(9.2)+(-12)+4.6