直接写出结果: (1)3
(2)
(3)-4-|-4|=______; (4)(-2)3-32=______; (5)(-9)+______=9; (6)-p2-p2-p2=______; (7)+(a-2)-2(a-6)=______; (8)如果x<0,并且x2=256,那么x=______. |
(1)3
+(-11 4
)=31 12
-13 12
=21 12 1 6
(2)
÷(-1.5)=1 4
×(-1 4
)=-2 3 1 6
(3)-4-|-4|=-4-4=-8
(4)(-2)3-32=-8-9=-17
(5)∵9-(-9)=18,
∴(-9)+18=9;
(6)-p2-p2-p2=-3p2;
(7)+(a-2)-2(a-6)=a-2-2a+12=-a+10;
(8)∵x2=256,
∴x=±16,
又∵x<0,
∴x=-16.