计算与化简(每小题4分,共16分)
(1) -20+(-14)-(-18)-13
(2)-4÷
-(-
)×(-30)
(3)
(4) 
计算:
(1)(-3)+(+9)
(2)-20+(+3)-(-5)-(+7)
(3)(-7)×(-5)-90÷(-15)
(4)-102+[(-4)2+(3+32)×2]÷(-2)3.
计算:
(1)3—4.3—7+5.3;
(2)
;
(3)
;
(4)
.
计算题.
(1)计算:
-
+20150;
(2)
+|1-
|-(
)-2.
计算
(1)
(2)
(3)
(4)
(5)
(6)19
×(-12)